06451-1643 AGC 1 AB (Sirius)

Coord 2000	06451-1643		Discov num	AGC   1		Comp	AB		Coord arcsec 2000	06 45 08.92 -16 42 58.0
Date first	1862		Date last	2024		Obs	2064
Pa first	85		Pa last	59.1		P.A. Now (θ)	57° (calc)
Sep first	10.2		Sep last	11.13		Sep. Now (ρ)	11.163" (calc)
Mag pri	-1.47		Mag sec	8.44		delta mag (ΔM)	9.91		Spectral class	A1Vm+DA2 (white/white dwarf)
Pri motion ra	-055		Sec motion ra	-055
Pri motion dec	-122		Sec motion dec	-122
Notes	N O P (See Notes, Orbital solution, 100-year proper motion)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Sirius	151881	06 45 09 -16 42 58	AGC 1 AB	2024	2064	59	11.1	-1.47	8.44	9.91	Y	<===
Show		151881	06 45 09 -16 42 58	LEC 1 AC	1999	1	30	64.5	-1.47	12.60	14.07
Show		151881	06 45 09 -16 42 58	AGC 1 AD	1915	2	183	31.6	-1.47	14.00	15.47
Show		151881	06 45 09 -16 42 58	HL 3 AE	2011	7	47	188.3	-1.47	14.50	15.97
Show		151881	06 45 09 -16 42 58	BU 1411 AF	2011	7	61	125.7	-1.47	13.80	15.27
Show		151881	06 45 09 -16 43 02	AGC 1 BC	1929	7	129	1.4	8.44	12.60	4.16

Sextuple system
6 estimated visually detectable stars in this system

Common name	Sirius		Constellation	Canis Major		SAO	151881		HIP	32349
Tycho2	5949-02777-1		HD	48915		HR	2491		GC	8833
ADS	5423		BD	BD-16 1591		Bayer	Alpha Canis Majoris		Bayer name	Alp CMa
Flamsteed	9 Canis Majoris		Flamsteed name	9 CMa		FK5	257		Distance	2.64
Distance ly	8.61		Bayer greek	α CMa

Other names

Dog Star, Aschere, Canicula, Al Shira, Sothis, Alhabor, Mrgavyadha, Lubdhaka, Tenr?sei, Sirio, Lokabrenna

Meaning

burning or hot

Period (P)	50.1284y	± 0.0043	Periastron (T)	1994.5715y	± 0.0058	Semi-major axis (a)	7.4957a	± 0.0025
Eccentricity (e)	0.59142	± 0.00037	Inclination (i)	136.336°	± 0.04	Longitude of periastron (ω)	149.161°	± 0.075
Node (Ω)	45.4°	± 0.071	Notes	n		Reference	BdH2017
Equinox	2000		Last observation	2016		Grade	2	(1=Definitive, 9=Indet.)

label theta rho 2000 151.2 4.460 2001 140.3 4.846 2002 131.1 5.272 2003 123.3 5.724 2004 116.6 6.188 2005 110.9 6.652 2006 105.9 7.109 2007 101.6 7.554 2008 97.7 7.982 2009 94.1 8.391 2010 91.0 8.777 2011 88.0 9.141 2012 85.3 9.479 2013 82.8 9.792 2014 80.4 10.078 2015 78.1 10.337 2016 76.0 10.567 2017 73.9 10.769 2018 71.9 10.941 2019 70.0 11.082 2020 68.1 11.193 2021 66.2 11.273 2022 64.4 11.320 2023 62.5 11.333 2024 60.7 11.313 2025 58.8 11.256 2026 57.0 11.163 2027 55.1 11.032 2028 53.1 10.861 2029 51.1 10.648 2030 48.9 10.392 2031 46.7 10.090 2032 44.3 9.739 2033 41.7 9.337 2034 38.9 8.880 2035 35.7 8.364 2036 32.1 7.787 2037 27.9 7.143 2038 22.8 6.431 2039 16.3 5.651 2040 7.7 4.811 2041 355.3 3.943 2042 336.1 3.138 2043 306.7 2.612 2044 270.9 2.614 2045 240.5 2.990 2046 217.2 3.356 2047 197.9 3.612 2048 180.9 3.834 2049 165.8 4.093 2050 152.8 4.414

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. Measures: green=micrometric, blue=interferometric, purple=photographic

discov_num	notes	refcode
AGC 1	AB: Sirius = alp CMa = 9 CMa.
	Bessel, in 1834, notes that the proper motion was variable and, in his
	letter to Humboldt, stated that "..Procyon and Sirius are genuine
	binary systems, each consisting of a visible and an invisible star."
	Not quite invisible, this large dm pair consisting of a main sequence
	A star and a white dwarf was first resolved by Alvan G. Clark on 31
	January 1862 in the process of of testing the 18.5" refractor. See
	notes by Burnham and Aitken.	Bu_1906
	The separation for the 1862.275 measurement by Lassell is reported as	Lsl1862
	4.92". This is clearly incorrect and not consistent with measurements
	by other observers. WDS catalogers assume an factor of 2 error and
	correct separation to 9.84".
	Otto Struve lists a measurement of Sirius in 1861.21. However, this	Stt1893a
	predates the discovery of the companion Sirius B by A. Clark and his
	son on 1962 Jan 31 and the first formal measurement by G. P. Bond on
	1862 February 7. Comparing the uncorrected PA and separation in
	Struve's table in 1893 with the measurements published by Struve, we	Stt1864
	suspect that 1861.21 is a typo and should refer to the observation on
	1863-Mar-16.
	Companion almost hidden behind secondary mirror diffraction ray from
	Sirius B was never observed at these position angles until the early	Sea1882
	20th century. We suspect that this is a clerical error and that the
	measurements pertain to another system.
	For the 1882.988 measurement the PA is listed as 41.6 deg and is	Bu_1883
	40.6 in another.	Bu_1883b
	Many of the recovery observations of Sirius B following the periastron
	passage after 1890 are doubtful. The recovery observations made by	See1896d
	See, Douglass, and Cogshall at Lowell Observatory from 1896.668 to	Dgl1896
	1896.695 were taken in the morning shortly before sunrise when Sirius	Cog1896a
	was low in the sky. See notes that the mean position angle of 220 deg
	at 5.10" is about 30 deg behind its predicted location and the sep
	sep is larger than expected based on previous orbit fit. Aitken and	A__1896d
	Schaeberle reported measurements between 1896.814-1897.027 made from	Shb1897a
	Lick Observatory at a significantly different mean position angle of
	189 deg and 3.7". Both Aitken and Schaeberle comment that neither of
	them saw a star at the position reported by Dr. See. Following the
	contradictory reports, Stimson J. Brown published observations from	Brs1896
	his logbook that were taken earlier in March 1896 at the USNO. The
	position angle is similar to the values reported by Aitken, but the
	separation is about 1" larger. Brown notes that the observations were
	taken under challenging conditions and he did not have much confidence
	in their reliability. See later refuted his earlier measurements	See1897e
	after unsuccessfully searching for the companion while observing from
	Mexico and then successfully detecting the companion at a pa of 175 deg
	and 4.6" in September 1897 at Lowell. He writes, "The erroneous
	conclusion to which I was led last year seems to have arisen from a
	very unusual and entirely unexpected cause, of which we need not
	speak here..." In hindsight, See also reported in that publication,
	two observations from April 1895 that he initially did not think were
	worthy of announcing. The difficulty in attempting to find Sirius B
	using the Lick Observatory 36 inch in February and March of 1896 was
	described by William J. Hussey.	Hu_1896
	See1900d and Brs1900b measures : "All of the observations have been	See1900d
	thoroughly checked. A number of errors were discovered in the earlier	Brs1900b
	reductions and corrected. These reductions have also been slighty	See1911
	changed by the adoption of a later and better determined value of a	Brs1911a
	revolution of the micrometer screw. This will account for small
	discrepanacies between the results published here and those previously
	published in the astronomical periodicals."
	For the 1904.186 measuremment by T. Lewis, the title of the article,	L__1904
	text, and first page of the data table all refer to observations taken
	in 1904. Subsequent pages of the data table (including the page that
	Sirius is listed on) list an epoch of 1903. However, this is probably a
	typo, so date corrected the date to be in 1904.
	Sirius A.	B__1959a
	Hipparcos astrometric solution adopted some elements from the orbit of	HIP1997d
	Gatewood & Gatewood (1978).	Gat1978
	AB: Malkov et al. (2012) derive dynamical, photometric, and
	spectroscopic masses 3.08 +/- 0.42, 2.46, and 2.19 Msun, respectively.	Mlk2012
	BC: Suspected by Fox in 1920, also reported by Innes, van den Bos, and	A__1932a
	Finsen. Other observers fail to confirm duplicity of B. Single 1945,	B__1929a
	1946, 1949, 1950. Recovered by Popovic in 1975 at approximately the	Fin1929a
	the same position as the 1929 resolutions. If these are periodic, the	Pop1977b
	next approximate time for resolution is 2020. Therefore, since we
	believe the detections of C to be real, but likely of a background
	optical interloper, BC carries a "U" code and not an "X" code.
	However, very compelling argument that this is a chance allignment of	Lec2000
	a non-physical background star appearing close to Sirius AB is the
	1920-30 time period is now assumed.
	Time displacement residuals over a period of 6.8y are linear ruling	Ldb1973
	out a 6.4y perturbation with an amplitude of 0.14". There is no
	evidence of a close companion with this nature associated with Sirius.
	Otto Struve corrected his measurements for systematic errors by	Stt1893a
	measuring artificial double stars. He provided both the original and
	corrected measures of the separation and position angle for the
	companion of Sirius. Aitken cautions that the variance of the angles	A__1935f
	and distances compared with other observers is often larger for
	Struve's corrected values. However in the case of Struve's measurements
	of the companion of Sirius, Bond et al. mean residuals in the position	BdH2017
	angle improved when using the corrected values, while the residuals in
	separation did not change significantly, so the corrected values are
	reported here.
	For the photographic observations by Lindenblad, tables are given for	Ldb1970
	the raw individual measures, while only the mean measures are corrected	Ldb1973
	for emulsion contraction. The average time span covered by these mean
	measures is ~ 70 nights, so we used Lindenblad's tabulated scale	BdH2017
	corrections to compute corrected separations and position angles for
	the individual measurements. We then took the mean for plates taken on
	the same night, reducing the number of individual measurements from 157
	down to 77 measurements on unique dates.
	X coded van Albada (1962) measures corrected for emulsion contraction.	vAb1971
	Jasinta & Hidayat (1999) did not correct these epochs for emulsion	Jas1999b
	contraction.
	Measure of Anton corrected in a later publication.	Ant2010
		Ant2012
	Schroeder measure re-reducted and corrected in Bond Table 2.	Shd2000
		BdH2017
	Sirius A mass is 2.063+/-0.023 \msun with an age of 242+/-5 Myr,	BdH2017
	a radius of 1.7144+/-0.0090 \rsun, luminosity of 24.74+/-0.70 \lsun,
	and Teff of 9845+/-64 K. Sirius B mass is 1.018+/-0.011 \msun,
	an age of 224(+34-19) Myr, a radius of 0.008098+/-0.000046 \rsun,
	luminosity of 0.02448+/-0.00033 \lsun and Teff of 25,369+/-46 K.
	Intensity Interferometer Limb-darkened diameter 5.89 +/- 0.16 mas.	HBr1974
	Mk III Limb-darkened diameter 5.993 +/- 0.108 mas.	MkT2003
	AD: Rectilinear solution by Mason & Hartkopf (2015).	Msn2015a
HL 3	AE: Rectilinear solution by Mason & Hartkopf (2015).	Msn2015a
BU 1411	AF: Rectilinear solution by Mason & Hartkopf (2015).	Msn2015a

refcode	metd	author	reference
A__1896d	Ma -	Aitken, R.G.	1896PASP....8..314A
A__1896d		PASP 8, 314, 1896 (all data also in A__1896a)	1896AJ.....17...27A
A__1932a	Ma -	Aitken, R.G.	1932QB821.A43......
A__1932a		Aitken Double Star Catalogue, 1932
A__1935f	-	Aitken, R.G.	1935QB821.A3.......
A__1935f		The Binary Stars, 1935
Ant2010	C u	Anton, R.	2010JDSO....6..133A
Ant2010		JDSO 6, 133, 2010
Ant2012	C u	Anton, R.	2012JDSO....8...15A
Ant2012		JDSO 8, 15, 2012
B__1929a	Ma j	van den Bos, W.H.	1929CiUO...80...59V
B__1929a		Union Obs. Johannesburg Circ. 80, 59, 1929
B__1959a	Mb j	van den Bos, W.H.	1959ApJS....4...45V
B__1959a		ApJS 4, 45, 1959
BdH2017	H+ j	Bond, H.E., Schaefer, G.H., Gilliland, R.L., Holberg, J.B., Mason, B.D.,	2017ApJ...840...70B
BdH2017	+Po	Lindenblad, I.W., Seitz-McLeese, M., Arnett, W.D., Demarque, P., Spada, F.,
BdH2017	+orb	Young, P.A., Barstow, M.A., Burleigh, M.R. & Gudehus, D.
BdH2017	+not	ApJ 840, 70, 2017
Brs1896	Ma j	Brown, S.J.	1896AJ.....17...46B
Brs1896		AJ 17, 46, 1896
Brs1900b	Ma j	Brown, S.J.	1900AN....152..329B
Brs1900b		AN 152, 329, #3645, 1900
Brs1911a	Ma j	Brown, S.J.	.
Brs1911a		Pub. USNO 6, A117, 1911
Bu_1883	Ma j	Burnham, S.W. (BU 864 - 1025)	1883MmRAS..47..167B
Bu_1883		MemRAS 47, 167, 1883
Bu_1883b	Ma -	Burnham, S.W.	1883MNRAS..43..318B
Bu_1883b		MNRAS 43, 318, 1883
Bu_1906	Ma j	Burnham, S.W.	1906QB821.B972.....
Bu_1906	+M	Burnham Double Star Cat., 1906
Cog1896a	Ma j	Cogshall, W.A.	1896AJ.....16..211S
Cog1896a		AJ 16, 211, 1896
Dgl1896	Ma j	Douglass, A.E.	1896AJ.....17....1S
Dgl1896		AJ 17, 1, 1896
Fin1929a	Ma j	Finsen, W.S.	1929CiUO...80...85F
Fin1929a		Union Obs. Johannesburg Circ. 80, 85, 1929
Gat1978	-	Gatewood, G.D. & Gatewood, C.V.	1978ApJ...225..191G
Gat1978		ApJ 225, 191, 1978
HBr1974	-	Hanbury Brown, R., Davis, J., & Allen, L.R.	1974MNRAS.167..121H
HBr1974		MNRAS 167, 121, 1974
HBr1974
HIP1997d	orb -	Hipparcos	1997yCat.1239....0E
HIP1997d		Hipparcos Catalog, ESA SP-1200, 1997
HIP1997d		(DMSA/O Orbital Solutions)
Hu_1896	not -	Hussey, W.F.	1896PASP....8..183H
Hu_1896		PASP 8, 183, 1896
Jas1999b	Pa u	Jasinta, D.M.D. & Hidayat, B.	1999A&AS..136..293J
Jas1999b		A&AS 136, 293, 1999
L__1904	Ma j	Lewis, T.	1904RGOO...........
L__1904		Greenwich Observations, 1904 (data also in MNRAS 66, 17, 1905)	1905MNRAS..66...17L
Ldb1970	Po j	Lindenblad, I.W.	1970AJ.....75..841L
Ldb1970		AJ 75, 841, 1970 (erratum in AJ 78, 226, 1973)
Ldb1973	Po j	Lindenblad, I.W.	1973AJ.....78..205L
Ldb1973		AJ 78, 205, 1973
Lec2000	C -	Bonnet-Bidaud, J.M., Colas, F., Lecacheux, J.	2000A&A...360...991
Lec2000		A&A 360, 991, 2000
Lsl1862	Mb j	Lassell, W.	1862AN.....57..251L
Lsl1862		AN 57, 251, #1360, 1862
MkT2003	Km -	Mozurkewich, D., Armstrong, J.T., Hindsley, R., Quirrenbach, A., Hummel, C.A.,	2003AJ....126.2502M
MkT2003	+not	Hutter, D., Johnston, K.J., Hajian, A., Elias, N.M., II, Buscher, D., & Simon, R.
MkT2003		AJ 126, 2502, 2003
Mlk2012	not -	Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A.	2012A&A...546A..69M
Mlk2012		A&A 546, A69, 2012
Msn2015a	orb -	Mason, B.D. & Hartkopf, W.I.	2015IAUDS.187....1M
Msn2015a	+lin	Inf. Circ. 187, 1, 2015
Pop1977b	Ma j	Popovic, G.M.	1977BOBeo.128...37P
Pop1977b		Bull. Obs. Astron. Belgrade #128, 37, 1977
Sea1882	Ma -	Searle, G.M.	1882AnHar..13...17.
Sea1882		Harvard Ann. 13, 17, 1882
See1896d	Ma j	See, T.J.J.	1896AJ.....17....1S
See1896d		AJ 17, 1, 1896
See1897e	Ma j	See, T.J.J.	1897AJ.....18...75S
See1897e		AJ 18, 75, 1897
See1900d	Ma j	See, T.J.J.	1900AN....153...99S
See1900d		AN 153, 99, #3654, 1900
See1911	Ma j	See, T.J.J.	.
See1911		Pub. USNO 6, A117, 1911
Shb1897a	Ma j	Schaeberle, J.M.	1897AJ.....17...76S
Shb1897a		AJ 17, 76, 1897
Shd2000	Hp j	Schroeder, D.J., Golimowski, D.A., Brukardt, R.A., Burrows, C.J., Caldwell, J.J.,	2000AJ....119..906S
Shd2000		Fastie, W.G., Ford, H.C., Hesman, B., et al.
Shd2000		AJ 119, 906, 2000
Stt1864	Ma -	Struve, O.	1864MNRAS..24..149S
Stt1864		MNRAS 24, 149, 1864
Stt1893a	Ma j	Struve, O.	1893ObPul..10....1S
Stt1893a		Pulkova Obs. Observations 10, 1, 1893
vAb1971	Pa j	van Albada, G.B.	1971A&A....11..317V
vAb1971	+Po	A&A 11, 317, 1971

discov	author
A	Aitken, R.G.
BDH	Bond, H.E., Gilliland, R.L., Schaefer, G.H., Demarque, P., Girard, T.M.,
BDH	Holberg, J.B., Gudehus, D., Mason, B.D., Kozhurina-Platais, V., Burleigh, M.R.,
BDH	Barstow, M.A., & Nelan, E.P.
BDH	Bond, H.E., Schaefer, G.H., Gilliland, R.L., Holberg, J.B., Mason, B.D.,
BDH	Lindenblad, I.W., Seitz-McLeese, M., Arnett, W.D., Demarque, P., Spada, F.,
BDH	Young, P.A., Barstow, M.A., Burleigh, M.R. & Gudehus, D.
HIP	(non-component double star solution: G = acceleration solution,
HIP	O = orbit solution, V = variability-induced mover, X = stochastic solution)
MKT	Shao, M., Colavita, M.M., Hines, B.E., Staelin, D.H., Hutter, D.J., Johnston, K.J.,
MKT	Mozurkewich, D., Simon, R.S., Hershey, J.L., Hughes, J.A. & Kaplan, G.H.
MKT	Hutter, D.J., Johnston, K.J., Mozurkewich, D., Simon, R.S., Colavita, M.M., Pan,
MKT	X.P., Shao, M., Hines, B.E., Staelin, D.H., Hershey, J.L., Hughes, J.A. & Kaplan,
MKT	G.H.
MKT	Mozurkewich, D., Johnston, K.J., Simon, R.S., Bowers, P.F., Gaume, R., Hutter,
MKT	D.J., Colavita, M.M., Shao, M. & Pan, X.P.
MKT	Pan, X.P., Shao, M., Colavita, M.M., Armstrong, J.T., Mozurkewich, D.,
MKT	Vivekanand, M., Denison, C.S., Simon, R.S., et al.
MKT	Armstrong, J.T., Mozurkewich, D., Vivekanand, M., Simon, R.S., Denison, C.S.,
MKT	Johnston, K.J., Pan, X.-P., Shao, M., et al.
MKT	Armstrong, J.T., Hummel, C.A., Quirrenbach, A., Buscher, D.F., Mozurkewich, D.,
MKT	Vivekanand, M., Simon, R.S., Denison, C.S., et al.
MKT	Hummel, C.A., Armstrong, J.T., Quirrenbach, A., Buscher, D.F., Mozurkewich, D.,
MKT	Simon, R.S., & Johnston, K.J.
MKT	Hummel, C.A., Armstrong, J.T., Quirrenbach, A., Buscher, D.F., Mozurkewich, D.,
MKT	Elias, N.M., & Wilson, R.E.
MKT	Mozurkewich, D., Armstrong, J.T., Hindsley, R., Quirrenbach, A., Hummel, C.A.,
MKT	Hutter, D., Johnston, K.J., Hajian, A., Elias, N.M., II, Buscher, D., & Simon, R.
MKT	Armstrong, J.T., Mozurkewich, D., Hajian, A.R., Johnston, K.J., Thessin, R.N.,
MKT	Peterson, D.M., Hummel, C.A., & Gilbreath, G.C.
MSN	Mason, B.D., Gies, D.R., Hartkopf, W.I., Bagnuolo, Jr., W.G.,
MSN	ten Brummelaar, T.A., & McAlister, H.A.
MSN	Mason, B.D., Martin, C., Hartkopf, W.I., Barry, D.J., Germain, M.E.,
MSN	Douglass, G.G., Worley, C.E., ten Brummelaar, T.A., et al.
MSN	Mason, B.D., Hartkopf, W.I., Raghavan, D., Subasavage, J.P., Roberts, L.C., Jr.,
MSN	Turner, N.H., & ten Brummelaar, T.A.
SHD	Schroeder, D.J., Golimowski, D.A., Brukardt, R.A., Burrows, C.J., Caldwell, J.J.,
SHD	Fastie, W.G., Ford, H.C., Hesman, B., et al.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	dm_number	notes	coord_arcsec_2000
06451-1643	AGC 1	AB	1997	610	190	3.7	-1.46	8.50	A1Vm	-16 1591	NODP	064509.25-164247.3
06451-1643	AGC 1	AB	2009	612	95	8.4	-1.46	8.50	A1Vm	-16 1591	NODP	064509.25-164247.3
06451-1643	AGC 1	AB	2010	638	92	8.9	-1.46	8.50	A1Vm	-16 1591	NODP	064508.92-164258.0
06451-1643	AGC 1	AB	2011	640	88	9.3	-1.46	8.50	A1Vm	-16 1591	NODP	064508.92-164258.0
06451-1643	AGC 1	AB	2013	642	83	9.6	-1.46	8.50	A1Vm	-16 1591	NODP	064508.92-164258.0
06451-1643	AGC 1	AB	2015	639	80	10.7	-1.46	8.50	A1Vm	-16 1591	NO P	064508.92-164258.0
06451-1643	AGC 1	AB	2016	640	76	10.9	-1.46	8.50	A1Vm	-16 1591	NO P	064508.92-164258.0
06451-1643	AGC 1	AB	2020	2061	67	11.2	-1.47	8.44	A1Vm+DA2	-16 1591	NO P	064508.92-164258.0
06451-1643	AGC 1	AB	2021	2062	67	11.3	-1.47	8.44	A1Vm+DA2	-16 1591	NO P	064508.92-164258.0
06451-1643	AGC 1	AB	2022	2063	65	11.3	-1.47	8.44	A1Vm+DA2	-16 1591	NO P	064508.92-164258.0
06451-1643	AGC 1	AB	2024	2064	59	11.1	-1.47	8.44	A1Vm+DA2	-16 1591	NO P	064508.92-164258.0

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Show	date	username	difficulty	sep	sep_sigma	pa	pa_sigma	delta_mag	#	notes
Show	24/01/28	Zeitgenosse	very difficult	10.80		59.00			1	astrometric from 2 photographs (one with a short and one with a longer exposure to derive scale and angle of camera)

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FoV: 30" 1' 5' 15' 30' 1° 2° 4° 5° 8° Limit: 2 3 4 5 10 15 20 25 30 50 100 Primaries only
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Show name coord_2000 discov# comp pa sep dist(') Show Sirius 06451-1643 AGC 1 AB 59 11.1 0 Show Sirius 06451-1643 AGC 1 AD 183 31.6 0 Show Sirius 06451-1643 HL 3 AE 47 188.3 0 Show Sirius 06451-1643 BU 1411 AF 61 125.7 0 Show Sirius 06451-1643 LEC 1 AC 30 64.5 0 Show 06451-1643 AGC 1 BC 129 1.4 1 Show 06449-1651 GAL 260 332 3.7 9 Show 06456-1653 A 3035 281 1.9 13 Show 06460-1646 SHN 107 -1 0.1 13 Show 06463-1652 I 481 163 0.7 20 Show 06427-1644 KPP 144 75 3.8 36 Show 06435-1709 A 3034 54 1.5 36 Show 06471-1734 TDS4130 21 0.8 59 Show 06475-1553 GAL 263 67 5.9 61 Show 06488-1613 BU 20 28 3.3 61 Show 06420-1600 BU 19 169 3.7 63 Show 06406-1625 TDS 268 357 1.0 68 Show 06499-1651 GAL 415 51 13.6 68 Show 06497-1558 TDS4183 98 0.5 80 Show 06425-1532 BRT 611 263 4.4 81 Show 06497-1557 TDS4182 98 0.6 81 Show 06471-1759 LDS 172 21 29.6 82 Show 06407-1549 TDS4022 166 0.4 84 Show 06504-1602 BU 898 CD 269 2.0 85 Show 06506-1611 TDS4201 294 0.7 85 Show 06404-1551 A 3032 306 0.5 86 Show 06504-1602 BU 898 AB 356 3.3 87 Show 06504-1602 BU 898 AC 282 97.7 87 Show 06446-1516 GAL 414 144 15.2 88 Show 06489-1533 GWP 838 167 203.0 89 Show 06418-1758 A 3033 188 0.3 89 Show 06481-1807 KPP4366 BC 17 3.4 94 Show 06510-1559 TDS4208 80 2.7 95 Show 06481-1807 GWP 833 AB 21 76.5 95 Show 06483-1520 A 3038 BC 321 0.2 96 Show 06483-1520 STF 972 A,BC 154 12.5 96 Show 06438-1819 TDS4077 28 0.6 99 Show 06413-1523 GAL 253 107 9.7 99 Show 06518-1729 ARA 170 110 5.5 106 Show 06386-1732 ARA 169 45 13.5 107 Show 06408-1811 ARA 348 69 12.6 108 Show 06443-1830 B 1964 318 1.0 108 Show 06380-1713 A 3031 318 3.6 108 Show 06504-1801 TDS4198 177 0.6 109 Show 06490-1509 AC 4 7 0.2 110 Show 06438-1832 TDS4078 51 0.6 111 Show 06380-1600 TDS3980 169 1.9 112 Show 06508-1526 DAM 423 180 7.8 112 Show 06435-1834 TDS4071 181 0.6 115 Show 06511-1524 DAM 424 CD 74 6.7 117 Show 06511-1524 RST3472 AB 275 1.9 118

	A	B	C	D	E
B	pa=180.0° sep=4.00"
C	pa=30.2° sep=64.46"	pa=28.5° sep=67.95"
D	pa=183.2° sep=31.59"	pa=183.7° sep=27.60"	pa=201.4° sep=93.71"
E	pa=47.0° sep=188.33"	pa=46.1° sep=191.08"	pa=55.4° sep=127.99"	pa=41.1° sep=212.26"
F	pa=60.8° sep=125.71"	pa=59.2° sep=127.71"	pa=85.8° sep=77.52"	pa=50.2° sep=145.11"	pa=202.6° sep=72.71"

Common name	Sirius		Meaning	burning or hot		Other names	Dog Star, Aschere, Canicula, Al Shira, Sothis, Alhabor, Mrgavyadha, Lubdhaka, Tenr?sei, Sirio, Lokabrenna		Coord arcsec 2000	064508.92-164258.0
Mag	-1.47		Spectral class	A1Vm (white)		PmRA	-55.00		PmDE	-122.0
SAO	172267		HIP	32349		Tycho2	5949-02777-1		HD	48915
HR	2491		DM	CD-25 3572		BD	BD-16 1591		Bayer	Alpha Canis Majoris
Bayer name	alp CMa		Flamsteed	9 Canis Majoris		Flamsteed name	9 CMa		FK5	257

SAO	172267		DelFlag			RA1950			PmRA1950	0.0019
DE1950			PmDE1950	0.002		Vmag	8.9		SpType	A0
Double code			Source	25		CatNum	3964		DM	CD-25 3572
DMcomp			BDsup			HD	48967		M HD	0
GC			RA1950rad	1.75869742		DE1950rad	-0.45000291		PmRA2000	0.0022
PmDE2000	0.004

Catalog	H		HIP	32349		Proxy			RAhms	06 45 09.25
DEdms	-16 42 47.3		Vmag	-1.44		VarFlag	2		R Vmag	G
RAdeg	101.289		DEdeg	-16.7131		AstroRef	+		Plx	379.21
CCDM	-546.01-1		N CCDM	I		Nsys	1		Ncomp	1
MultFlag	O		Source			Qual			M HIP
Theta			Rho			HD			BD	BD-16 1591
CD			CP			Dm number	-16 1591		VIred	-0.02
SpType	A0m...		R SpType			Coord arcsec 2000	064509.25-164247.3

HIP	32349		Sn	0		So	4		Nc	1
RArad	1.7678185359		DErad	-0.2916993748		Plx	379.21		PmRA	-546.01
PmDE	-1223.07		E RArad	1.21		E DErad	1.04		E Plx	1.58
E pmRA	1.33		E pmDE	1.24		Hpmag			E Hpmag	0.0024
SHp	0.04		VA	0		BV	0.009		E BV	0.007
VI	-0.02

Ccdm	06451-1643		RComp			Comp	A		Note1
Note2			Discov num			DRAs	2.87		DDEs	2.0
R dRAs	6		Year			Theta			Rho
Obs	4		Vmag	-1.6		Sp	A0		PmNote	*
PmRA	-553		PmDE	-1205		Dm number	-16 1591		Cat1	BD
Name2	151881		Cat2	SAO		HD	48915		M HD
ADS BDS	A 5423		M ADS BDS			N IDS			IDS	06408S1635A
HIC	32349

Coord arcsec 2000	064508.92-164302.0		Coord calc	064508.92-164302.0		Mag	8.44		Spectral class	DA2 (white dwarf)
PmRA	-55.00		PmDE	-122.0		Delta magnitude	9.91

Ccdm	06451-1643		RComp			Comp	B		Note1	*
Note2			Discov num	AGC 1		DRAs	2.87		DDEs	2.0
R dRAs	6		Year	1862		Theta			Rho
Obs	99		Vmag	8.5		Sp	A7		PmNote	*
PmRA	-553		PmDE	-1205		Dm number			Cat1
Name2			Cat2			HD			M HD
ADS BDS	A 5423		M ADS BDS			N IDS			IDS	06408S1635B
HIC	32349

Coord arcsec 2000

064511.18-164202.3

Mag

12.6

Delta magnitude

14.07

Coordinate calculated

yes

Ccdm	06451-1643		RComp	B		Comp	C		Note1
Note2			Discov num	AGC 1		DRAs	2.87		DDEs	2.0
R dRAs	6		Year	1929		Theta	129		Rho	1.4
Obs	7		Vmag			Sp			PmNote	*
PmRA	-553		PmDE	-1205		Dm number			Cat1
Name2			Cat2			HD			M HD
ADS BDS	A 5423		M ADS BDS			N IDS			IDS	06408S1635C
HIC	32349

Coord arcsec 2000

064508.80-164329.5

Mag

14

Delta magnitude

15.47

Coordinate calculated

yes

Ccdm	06451-1643		RComp			Comp	D		Note1
Note2			Discov num	AGC 1		DRAs			DDEs
R dRAs			Year	1915		Theta	183		Rho	31.6
Obs	1		Vmag	14.0		Sp	A0		PmNote
PmRA			PmDE			Dm number			Cat1
Name2			Cat2			HD			M HD
ADS BDS	A 5423		M ADS BDS			N IDS			IDS	06408S1635D
HIC

Coord arcsec 2000

064518.51-164049.6

Mag

14.5

Delta magnitude

15.97

Coordinate calculated

yes

Coord arcsec 2000

064516.56-164156.7

Mag

13.8

Delta magnitude

15.27

Coordinate calculated

yes