Coord 2000 | 00491+5749 | Discov num | STF 60 | Comp | BH | Coord arcsec 2000 | 00 49 05.16 +57 49 03.9 | ||||
Date first | 1928 | Date last | 2020 | Obs | 5 | ||||||
Pa first | 2 | Pa last | 355.2 | P.A. Now (θ) | 355.2° | ||||||
Sep first | 651.0 | Sep last | 688.4 | Sep. Now (ρ) | 688.4" | ||||||
Mag pri | 7.36 | Mag sec | 8.41 | delta mag (ΔM) | 1.05 | Spectral class | K7 (yellow-orange) | ||||
Pri motion ra | +111 | Sec motion ra | -001 | ||||||||
Pri motion dec | -049 | Sec motion dec | -000 | ||||||||
Notes | N U P (See Notes, Proper motion indicates non-physical, 100-year proper motion) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | Achird | 21732 | 00 49 06 +57 48 55 | STF 60 AB | 2022 | 1086 | 327 | 13.4 | 3.52 | 7.36 | 3.84 | Y | |
Show | 21732 | 00 49 06 +57 48 55 | STF 60 AC | 2000 | 4 | 260 | 225.0 | 3.52 | 11.40 | 7.88 | |||
Show | 21732 | 00 49 06 +57 48 55 | STF 60 AD | 2011 | 7 | 354 | 189.4 | 3.52 | 12.80 | 9.28 | |||
Show | 21732 | 00 49 06 +57 48 55 | STF 60 AE | 2015 | 24 | 126 | 75.6 | 3.52 | 10.15 | 6.63 | |||
Show | 21732 | 00 49 06 +57 48 55 | STF 60 AF | 2000 | 3 | 276 | 378.3 | 3.52 | 11.53 | 8.01 | |||
Show | 21732 | 00 49 06 +57 48 55 | STF 60 AG | 2012 | 19 | 259 | 419.7 | 3.52 | 9.53 | 6.01 | |||
Show | 21732 | 00 49 06 +57 48 55 | STF 60 AH | 2012 | 4 | 355 | 701.1 | 3.52 | 8.41 | 4.89 | |||
Show | 21732 | 00 49 06 +57 48 55 | SMR 2 AI | 2012 | 7 | 73 | 90.3 | 3.52 | 11.60 | 8.08 | |||
Show | 21732 | 00 49 06 +57 48 55 | SMR 2 AJ | 2012 | 5 | 262 | 237.1 | 3.52 | 12.30 | 8.78 | |||
Show | 00 49 05 +57 49 04 | STF 60 BC | 2000 | 4 | 257 | 218.7 | 7.36 | 11.40 | 4.04 | ||||
Show | 00 49 05 +57 49 04 | STF 60 BD | 2000 | 1 | 1 | 172.2 | 7.36 | 12.80 | 5.44 | ||||
Show | 00 49 05 +57 49 04 | STF 60 BE | 2020 | 4 | 126 | 105.5 | 7.36 | 10.15 | 2.79 | ||||
Show | 00 49 05 +57 49 04 | STF 60 BF | 2000 | 2 | 275 | 369.1 | 7.36 | 11.53 | 4.17 | ||||
Show | 00 49 05 +57 49 04 | STF 60 BG | 2000 | 2 | 254 | 404.0 | 7.36 | 9.53 | 2.17 | ||||
Show | 00 49 05 +57 49 04 | STF 60 BH | 2020 | 5 | 355 | 688.4 | 7.36 | 8.41 | 1.05 | <=== | |||
Show | 00 48 19 +57 49 34 | STF 60 FG | 2015 | 10 | 188 | 142.2 | 11.53 | 9.53 | 2.00 |
Constellation | Cassiopeia |
discov_num | notes | refcode |
STF 60 | eta Cas = 24 Cas = Achird. | |
Proper motion of A +1141 -572. PM of B = +1105 -493. | ||
A has been reported to be a | Dob1927 | |
spectroscopic binary, but this is not confirmed. Doberck, Pavel, and | Pav1914 | |
Harshaw measure attributed to BC, then later to BE, was actually to | Hsw2004 | |
another faint star; confusion was due to the high proper motion of the | ||
B component and the long time span since the previous measurement. | ||
Proper Motion of E -003-001, F -010+000, G +009-005, H -006-001 | ||
System has been discussed by van de Kamp & Flather. | Kam1955 | |
AB: H 3 3. | MEv2010 | |
AB: Additional notes may be found in Simonov (1937). | Smw1937 | |
AB: Malkov et al. (2012) derive dynamical, photometric, and | ||
spectroscopic masses 1.58 +/- 0.85, 1.71, and 1.60 Msun, respectively. | Mlk2012 | |
AB: Raghavan et al. (2010) do not accept the astrometric sub-system as | Rag2010 | |
real. | Tok2014d | |
CHARA Array Limb-darkened diameter 1.623 +/- 0.004 mas, | CIA2012e | |
R = 1.039 +/- 0.004 \rsun, L = 1.252 +/-0.019 \lsun, | ||
Teff = 6003 +/- 24 K, M = 0.972 +/- 0.012 \msun, | ||
Age = 5.4 +/- 0.9 Gyr. | ||
AD: Rectilinear solution by Hurowitz et al. (2013). | USN2013a |
refcode | metd | author | reference |
CIA2012e | not j | Boyajian, T.S., McAlister, H.A., van Belle, G., Gies, D.R., ten Brummelaar, T.A., | 2012ApJ...746..101B |
CIA2012e | von Braun, K., Farrington, C., Goldfinger, P.J., O'Brien, D., Parks, J.R., | . | |
CIA2012e | Richardson, N.D., Ridgway, S., Schaefer, G., Sturmann, L., Sturmann, J., Touhami, | . | |
CIA2012e | Y., Turner, N.H. & White, R. | . | |
CIA2012e | ApJ 746, 101, 2012 | . | |
Dob1927 | Ma - | Doberck, W.A. | 1927QB821.D6....... |
Dob1927 | +Mb | Erganz. AN 7, 1927 | |
Dob1927 | (catalog of measures 1875-1927; includes nearly all measures from earlier papers) | ||
Hsw2004 | Pa j | Harshaw, R. | ................... |
Hsw2004 | Webb Soc., Double Star Circ. 12, 2004 | ||
Kam1955 | - | van de Kamp, P. & Flather, E. | 1955AJ.....60..448V |
Kam1955 | AJ 60, 448, 1955 | ||
MEv2010 | - | MacEvoy, B. | ................... |
MEv2010 | private communication, 2010 (see http://www.handprint.com/ASTRO/index.html) | ||
Mlk2012 | not - | Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. | 2012A&A...546A..69M |
Mlk2012 | A&A 546, A69, 2012 | ||
Pav1914 | Ma j | Pavel, F. | 1914AN....198..323P |
Pav1914 | +C | AN 198, 323, 1914 | |
Rag2010 | K - | Raghavan, D., McAlister, H.A., Henry, T.J., Latham, D.W., Marcy, G.W., | 2010ApJS..190....1R |
Rag2010 | +S | Mason, B.D., Gies, D.R., White, R.J. & ten Brummelaar, T.A. | |
Rag2010 | +P | ApJS 190, 1, 2010 | |
Smw1937 | Ma - | Simonov, G.V. | 1938VeBB....5.....S |
Smw1937 | Pub. Berlin Babelsberg Obs. 11, Pt.5, 1937 | ||
Tok2014d | E2 - | Tokovinin, A. | 2014AJ....147...86T |
Tok2014d | AJ 147, 86, 2014 | ||
USN2013a | lin - | Hurowitz, J.L., Hartkopf, W.I., & Mason, B.D. | 2013IAUDS.181....1H |
USN2013a | Inf. Circ. 181, 1, 2013 |
idgroup | discov | author |
1 | SMR | Schlimmer, J. |
56 | STF | Struve, F.G.W. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
00491+5749 | STF 60 | BH | 2000 | 4 | 355 | 694.7 | 7.36 | 8.41 | N DP | 004906.22+574854.6 | |
00491+5749 | STF 60 | BH | 2020 | 5 | 355 | 688.4 | 7.36 | 8.41 | K7 | NU P | 004905.16+574903.9 |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
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A | B | C | D | E | F | G | H | I | |
B | pa=315.5° sep=12.89" | ||||||||
C | pa=250.8° sep=124.80" | pa=245.2° sep=119.86" | |||||||
D | pa=356.8° sep=188.70" | pa=359.5° sep=179.21" | pa=25.1° sep=253.24" | ||||||
E | pa=143.8° sep=55.08" | pa=142.2° sep=67.86" | pa=91.3° sep=150.51" | pa=169.5° sep=236.77" | |||||
F | pa=275.9° sep=378.98" | pa=274.6° sep=369.14" | pa=287.1° sep=271.22" | pa=247.8° sep=395.51" | pa=281.5° sep=418.00" | ||||
G | pa=249.1° sep=234.55" | pa=246.1° sep=229.69" | pa=247.1° sep=109.86" | pa=217.4° sep=342.72" | pa=261.1° sep=254.78" | pa=127.8° sep=199.98" | |||
H | pa=357.5° sep=699.47" | pa=358.3° sep=689.95" | pa=6.8° sep=745.02" | pa=357.8° sep=510.80" | pa=355.2° sep=745.86" | pa=27.7° sep=745.18" | pa=13.6° sep=804.92" | ||
I | pa=59.5° sep=53.24" | pa=72.0° sep=57.72" | pa=67.5° sep=177.31" | pa=160.8° sep=170.97" | pa=10.6° sep=72.65" | pa=91.6° sep=422.98" | pa=67.3° sep=287.17" | pa=173.6° sep=676.08" | |
J | pa=254.5° sep=129.69" | pa=249.3° sep=123.95" | pa=311.9° sep=9.54" | pa=207.1° sep=250.65" | pa=273.6° sep=157.87" | pa=106.3° sep=262.58" | pa=62.5° sep=106.14" | pa=187.3° sep=739.57" | pa=250.2° sep=181.63" |
Common name | Achird | Meaning | first applied to ? Cassiopeiae in the Skalnate Pleso Atlas of the Heavens published in 1950, but is not known prior to that. | Other names | MARFAK | Coord arcsec 2000 | 004906.29+574854.7 | ||||
Mag | 3.52 | Spectral class | G1V (yellow) | PmRA | 114.00 | PmDE | -57.0 | ||||
SAO | 21732 | HIP | 3821 | Tycho2 | 3663-02669-1 | HD | 4614 | ||||
HR | 219 | GC | 962 | BD | BD+57 150 | Bayer | Eta Cassiopeiae | ||||
Bayer name | Eta Cas | Flamsteed | 24 Cassiopeiae | Flamsteed name | 24 Cas |
Tycho2 | 3663-02669-1 | Pflag | X | RAmdeg | DEmdeg | ||||||
PmRA | PmDE | E RAmdeg | E DEmdeg | ||||||||
E pmRA | E pmDE | EpRAm | EpDEm | ||||||||
Num | Q RAmdeg | Q DEmdeg | Q pmRA | ||||||||
Q pmDE | BTmag | 4.142 | E BTmag | 0.014 | VTmag | 3.518 | |||||
E VTmag | 0.009 | Prox | 129 | TYC | T | HIP | 3821 | ||||
CCDM | A | RAdeg | 12.27143833 | DEdeg | 57.81649972 | EpRA 1990 | 1.58 | ||||
EpDE 1990 | 1.56 | E RAdeg | 3.1 | E DEdeg | 3.1 | Posflg | |||||
Corr | 0.3 |
SAO | 21732 | DelFlag | RA1950 | PmRA1950 | 0.1368 | ||||||
DE1950 | PmDE1950 | -0.521 | Vmag | 3.6 | SpType | F8 | |||||
Double code | Source | 70 | CatNum | 962 | DM | BD+57 150 | |||||
DMcomp | BDsup | HD | 4614 | M HD | 0 | ||||||
GC | 962 | RA1950rad | 0.20097791 | DE1950rad | 1.00445227 | PmRA2000 | 0.1377 | ||||
PmDE2000 | -0.529 |
Catalog | H | HIP | 3821 | Proxy | RAhms | 00 49 05.10 | |||||
DEdms | +57 48 59.6 | Vmag | 3.46 | VarFlag | 1 | R Vmag | H | ||||
RAdeg | 12.2713 | DEdeg | 57.8165 | AstroRef | A | Plx | 167.99 | ||||
CCDM | 00491+5749 | N CCDM | I | Nsys | 2 | Ncomp | 2 | ||||
MultFlag | C | Source | Qual | A | M HIP | AB | |||||
Theta | 313 | Rho | 12.49 | HD | 4614 | BD | BD+57 150 | ||||
CD | CP | Dm number | +57 150 | VIred | 0.65 | ||||||
SpType | G0V SB | R SpType | Coord arcsec 2000 | 004905.10+574859.6 |
HIP | 3821 | Sn | 17 | So | 3 | Nc | 2 | ||||
RArad | 0.2141737695 | DErad | 1.0090891165 | Plx | 167.98 | PmRA | 1086.59 | ||||
PmDE | -559.43 | E RArad | 0.3 | E DErad | 0.27 | E Plx | 0.48 | ||||
E pmRA | 0.4 | E pmDE | 0.33 | Hpmag | 3.5835 | E Hpmag | 0.0024 | ||||
SHp | 0.009 | VA | 2 | BV | 0.587 | E BV | 0.003 | ||||
VI | 0.66 |
Ccdm | 00491+5749 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | -0.28 | DDEs | -0.8 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 8 | Vmag | 3.6 | Sp | F8 | PmNote | * | ||||
PmRA | 1108 | PmDE | -510 | Dm number | +57 150 | Cat1 | BD | ||||
Name2 | +57 81 | Cat2 | AGK2/3 | HD | 4614 | M HD | |||||
ADS BDS | A 671 | M ADS BDS | N IDS | IDS | 00430N5717A | ||||||
HIC | 3821 |
Coord arcsec 2000 | 004905.16+574903.9 | Coord calc | 004905.16+574903.9 | Mag | 7.36 | Spectral class | K7V (yellow-orange) | ||||
PmRA | 111.00 | PmDE | -49.0 | Calc delta mag | 3.84 |
Ccdm | 00491+5749 | RComp | Comp | B | Note1 | * | |||||
Note2 | Discov num | STF 60 | DRAs | DDEs | |||||||
R dRAs | Year | 1959 | Theta | Rho | |||||||
Obs | 99 | Vmag | 7.2 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A 671 | M ADS BDS | N IDS | IDS | 00430N5717B | ||||||
HIC |
Coord arcsec 2000 | 004851.54+574813.7 | Mag | 11.4 | Calc delta mag | 7.88 | Calc coord | yes |
Ccdm | 00491+5749 | RComp | Comp | C | Note1 | ||||||
Note2 | Discov num | STF 60 | DRAs | -27.53 | DDEs | -46.3 | |||||
R dRAs | 65 | Year | 1922 | Theta | 238 | Rho | 158.9 | ||||
Obs | 2 | Vmag | 11.4 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A 671 | M ADS BDS | N IDS | IDS | 00430N5717C | ||||||
HIC |
Coord arcsec 2000 | 004904.97+575203.1 | Mag | 12.8 | PmRA | 0.00 | PmDE | 0.0 | ||||
Calc delta mag | 9.28 | Calc coord | yes |
Ccdm | 00491+5749 | RComp | Comp | D | Note1 | ||||||
Note2 | Discov num | STF 60 | DRAs | -0.60 | DDEs | 175.8 | |||||
R dRAs | 65 | Year | 1921 | Theta | 030 | Rho | 159.6 | ||||
Obs | 2 | Vmag | 11.6 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A 671 | M ADS BDS | N IDS | IDS | 00430N5717D | ||||||
HIC |
Coord arcsec 2000 | 004910.37+574810.3 | Mag | 10.15 | PmRA | 0.00 | PmDE | 0.0 | ||||
Calc delta mag | 6.63 | Calc coord | yes |
Ccdm | 00491+5749 | RComp | Comp | E | Note1 | ||||||
Note2 | Discov num | STF 60 | DRAs | 10.01 | DDEs | -56.8 | |||||
R dRAs | 65 | Year | 1921 | Theta | 120 | Rho | 190.6 | ||||
Obs | 6 | Vmag | 9.0 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | +57 155 | Cat1 | BD | ||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A 671 | M ADS BDS | N IDS | IDS | 00430N5717E | ||||||
HIC |
Coord arcsec 2000 | 004819.10+574933.6 | Coord calc | 004819.10+574933.6 | Mag | 11.53 | PmRA | -3.00 | ||||
PmDE | -2.0 | Tycho2 | 3663-01484-1 | Calc delta mag | 8.01 |
Tycho2 | 3663-01484-1 | Pflag | RAmdeg | 12.07959919 | DEmdeg | 57.82600727 | |||||
PmRA | -10.0 | PmDE | 0.3 | E RAmdeg | 121 | E DEmdeg | 118 | ||||
E pmRA | 4.1 | E pmDE | 4.5 | EpRAm | 1978.64 | EpDEm | 1981.49 | ||||
Num | 3 | Q RAmdeg | 0.9 | Q DEmdeg | 0.4 | Q pmRA | 0.9 | ||||
Q pmDE | 0.4 | BTmag | 13.351 | E BTmag | 0.238 | VTmag | 11.746 | ||||
E VTmag | 0.099 | Prox | 999 | TYC | HIP | ||||||
CCDM | RAdeg | 12.07964361 | DEdeg | 57.82600639 | EpRA 1990 | 1.59 | |||||
EpDE 1990 | 1.62 | E RAdeg | 131.5 | E DEdeg | 126.2 | Posflg | |||||
Corr | 0.3 |
Ccdm | 00491+5749 | RComp | Comp | F | Note1 | ||||||
Note2 | Discov num | STF 60 | DRAs | -46.83 | DDEs | 34.3 | |||||
R dRAs | 65 | Year | 1913 | Theta | 268 | Rho | 281.7 | ||||
Obs | 1 | Vmag | 11.2 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A 671 | M ADS BDS | N IDS | IDS | 00430N5717F | ||||||
HIC |
Coord arcsec 2000 | 004838.87+574731.0 | Mag | 9.53 | PmRA | 1.00 | PmDE | -1.0 | ||||
Calc delta mag | 6.01 | Calc coord | yes |
Ccdm | 00491+5749 | RComp | Comp | G | Note1 | ||||||
Note2 | Discov num | STF 60 | DRAs | -49.53 | DDEs | -107.5 | |||||
R dRAs | 65 | Year | 1915 | Theta | 243 | Rho | 339.2 | ||||
Obs | 4 | Vmag | 8.9 | Sp | A5 | PmNote | * | ||||
PmRA | 2 | PmDE | 26 | Dm number | +56 129 | Cat1 | BD | ||||
Name2 | +57 80 | Cat2 | AGK2/3 | HD | M HD | ||||||
ADS BDS | A 671 | M ADS BDS | N IDS | IDS | 00430N5717G | ||||||
HIC |
Coord arcsec 2000 | 004902.54+580033.5 | Mag | 8.41 | PmRA | -1.00 | PmDE | 0.0 | ||||
Calc delta mag | 4.89 | Calc coord | yes |
Ccdm | 00491+5749 | RComp | B | Comp | H | Note1 | |||||
Note2 | Discov num | STF 60 | DRAs | -8.22 | DDEs | 685.8 | |||||
R dRAs | 65 | Year | 1928 | Theta | 2 | Rho | 648.0 | ||||
Obs | 1 | Vmag | 8.6 | Sp | K7 | PmNote | * | ||||
PmRA | -7 | PmDE | 21 | Dm number | +57 151 | Cat1 | BD | ||||
Name2 | +57 82 | Cat2 | AGK2/3 | HD | M HD | ||||||
ADS BDS | A 671 | M ADS BDS | N IDS | IDS | 00430N5717H | ||||||
HIC | 3809 |
Coord arcsec 2000 | 004912.03+574921.7 | Mag | 11.6 | PmRA | 6.00 | PmDE | 3.0 | ||||
Calc delta mag | 8.08 | Calc coord | yes |
Coord arcsec 2000 | 004850.65+574820.1 | Mag | 12.3 | Calc delta mag | 8.78 | Calc coord | yes |