21441+2845 STF 2822 AB (Mu1 Cyg)

Coord 2000	21441+2845		Discov num	STF2822		Comp	AB		Coord arcsec 2000	21 44 08.57 +28 44 33.4
Date first	1823		Date last	2022		Obs	735
Pa first	113		Pa last	325.4		P.A. Now (θ)	327.6°
Sep first	5.7		Sep last	1.55		Sep. Now (ρ)	1.435"
Mag pri	4.75		Mag sec	6.18		delta mag (ΔM)	1.43		Spectral class	F6V+G2V (yellow-white/yellow)
Pri motion ra	+260		Sec motion ra	+260
Pri motion dec	-243		Sec motion dec	-243
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Mu1 Cyg	89940	21 44 09 +28 44 33	STF 2822 AB	2022	735	325	1.6	4.75	6.18	1.43	Y	<===
Show		89940	21 44 09 +28 44 33	STF 2822 AC	2012	16	292	76.6	4.75	12.93	8.18
Show		89940	21 44 09 +28 44 33	STF 2822 AD	2019	56	43	197.0	4.75	6.94	2.19
Show		89940	21 44 09 +28 44 33	FYM 25 AF	2012	3	72	111.5	4.75	12.64	7.89
Show		89940	21 44 09 +28 44 33	FYM 25 AG	2012	3	73	168.1	4.75	13.77	9.02
Show		89940	21 44 08 +28 44 35	STF 2822 BD	2012	24	45	196.7	6.18	6.94	0.76
Show		89944	21 44 19 +28 46 54	ES 521 DE	2015	7	286	17.5	6.94	13.13	6.19
Show		89944	21 44 19 +28 46 54	FYM 25 DG	2012	3	164	89.6	6.94	13.77	6.83

Septuple system
7 estimated visually detectable stars in this system

Name	Mu1 Cyg		Constellation	Cygnus		SAO	89940		HIP	107310
Tycho2	2201-02078-1		HD	206826		HR	8309		GC	30438
ADS	15270		BD	BD+28 4169		Bayer	Mu 1 Cygni		Bayer name	Mu1 Cyg
Flamsteed	78 Cygni		Flamsteed name	78 Cyg		Distance	22.24		Distance ly	72.55
Bayer greek	μ1 Cyg

Period (P)	692.0588y	± 94.1386	Periastron (T)	1958.2452y	± 0.836	Semi-major axis (a)	4.65541a	± 0.43627
Eccentricity (e)	0.61798	± 0.04089	Inclination (i)	75.219°	± 0.366	Longitude of periastron (ω)	143.214°	± 1.759
Node (Ω)	110.96°	± 0.411	Notes	n		Reference	Izm2019
Equinox			Last observation	2015		Grade	3	(1=Definitive, 9=Indet.)

label theta rho 2000 306.9 1.891 2001 307.6 1.876 2002 308.2 1.860 2003 308.9 1.844 2004 309.5 1.827 2005 310.2 1.810 2006 310.9 1.792 2007 311.6 1.775 2008 312.4 1.756 2009 313.1 1.738 2010 313.9 1.720 2011 314.6 1.701 2012 315.4 1.682 2013 316.2 1.663 2014 317.1 1.644 2015 317.9 1.625 2016 318.8 1.605 2017 319.7 1.586 2018 320.6 1.567 2019 321.5 1.548 2020 322.5 1.529 2021 323.4 1.510 2022 324.4 1.491 2023 325.5 1.472 2024 326.5 1.453 2025 327.6 1.435 2026 328.7 1.417 2027 329.9 1.400 2028 331.0 1.382 2029 332.2 1.365 2030 333.5 1.348 2031 334.7 1.332 2032 336.0 1.316 2033 337.3 1.301 2034 338.7 1.286 2035 340.1 1.272 2036 341.5 1.258 2037 342.9 1.245 2038 344.4 1.233 2039 345.9 1.221 2040 347.4 1.210 2041 349.0 1.200 2042 350.6 1.190 2043 352.2 1.181 2044 353.8 1.173 2045 355.5 1.166 2046 357.1 1.160 2047 358.8 1.154 2048 0.5 1.150 2049 2.2 1.146 2050 4.0 1.143

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
STF2822	mu Cyg. The A component is a double-lined spectroscopic binary.
	AB: H III 15. D is the principal component of ES 521.
	AC and AD: Optical pairs, based on study of relative motion of the
	components using the method of apparent motion parameters.	Kiy2008
	AB: H 3 15.	MEv2010
ES 521	DE: D is SB2	Tok2014d
FYM 25	DG pair initially listed incorrected as DH.	FyM2014b
STF2822	AC: Rectilinear solution by Friedman et al. (2011).	USN2011a

refcode	metd	author	reference
FyM2014b	C -	Fay, M.	.
FyM2014b		private communication
Izm2019	orb u	Izmailov, I.S.	2019AstL...45...30I
Izm2019		Ast. Lett. 45, 30, 2019
Izm2019
Izm2019
Kiy2008	-	Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S.	2008SvAL...32..405K
Kiy2008		SvAL 34, 405, 2008
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Tok2014d	E2 -	Tokovinin, A.	2014AJ....147...86T
Tok2014d		AJ 147, 86, 2014
USN2011a	lin -	Friedman, E.A., Mason, B.D., & Hartkopf, W.I.	2011IAUDS.175....1F
USN2011a		Inf. Circ. 175, 1, 2011

discov	author
ES	Espin, T.E.
IZM	Izmailov, I.S., Khovricheva, M.L., Khovrichev, M. Yu., Kiyaeva, O.V., Khrutskaya,
IZM	E.V., Romanenko, L.G., Grosheva, E.A., Maslennikov, K.L. & Kalinichenko, O.A.
KIY	Kiyaeva, O.V., Zhuchkov, R.Ya., Malogolovets, E.V., Orlov, V.V., Glukhova, A.V.,
KIY	Balega, Yu., Yu. & Bikmaev, I.F.
TOK	Tokovinin, A., Cantarutti, R., Tighe, R., Schurter, P., van der Bliek, N.,
TOK	Martinez, M., & Mondaca, E.
TOK	Tokovinin, A., Corbett, H., Fors, O., Howard, W., Law, N.M., Moe, M.,
TOK	Tokovinin, A. & Briceno, C.
USN	Franz, O.G., Gossner, J.L., Josties, F.J., Lindenblad, I.W., Mikesell, A.H.,
USN	Pub. USNO 18, Pt.1, 1963
USN	Kallarakal, V.V., Lindenblad, I.W., Josties, F.J., Riddle, R.K., Miranian, M.,
USN	Mintz, B.F., & Klugh, A.P.
USN	Harrington, R.S., Dahn, C.C., Behall, A.L., Priser, J.B., Christy, J.W., Riepe,
USN	B.Y., Ables, H.D., Guetter, H.H., et al.
USN	Dahn, C.C., Harrington, R., Riepe, B.Y., Christy, J.W., Guetter, H.H.,
USN	Behall, A.L., Walker, R.L., Hewitt, A.V., & Ables, H.D.
USN	Dahn, C.C., Harrington, R.S., Riepe, B.Y., Christy, J.W., Guetter, H.H.,
USN	Kallarakal, V.V., Miranian, M., Walker, R.L., et al.
USN	Harrington, R.S., Kallarakal, V.V., Christy, J.W., Dahn, C.C., Riepe, B.Y.,
USN	Guetter, H.H., Ables, H.D., Hewitt, A.V., et al.
USN	Dahn, C.C., Harrington, R.S., Kallarakal, V.V., Guetter, H.H., Luginbuhl, C.B.,
USN	Riepe, B.Y., Walker, R.L., Pier, J.R., et al.
USN	Harrington, R.S., Dahn, C.C., Kallarakal, V.V., Guetter, H.H., Riepe, B.Y.,
USN	Walker, R.L., Pier, J.R., Vrba, F.J., et al.
USN	Monet, D., Bird A., Canzian B., Dahn C., Guetter H., Harris H., Henden A.,
USN	Levine S., Luginbuhl C., Monet A.K.B., Rhodes A., Riepe B., et al.
USN	Harris, H.C., Dahn, C.C., Dupuy, T.J., Canzian, B., Guetter, H.H., Hartkopf, W.I.,
USN	Ireland, M.J., Leggett, S.K., Levine, S.E., Liu, M.C., Luginbuhl, C.B.,
USN	Monet, A.K.B., Stone, R.C., Subasavage, J.P., Tilleman, T., & Walker, R.L.
USN	Dahn, C.C., Harris, H.C., Subasavage, J.P., Ables, H.D., Canzian, B.J., Guetter,
USN	H.H., Harris, F.H., Henden, A.H., Leggett, S.K., Levine, S.E., Luginbuhl, C.B.,
USN	Monet, A.B., Monet, D.G., Munn, J.A., Pier, J.R., Stone, R.C., Vrba, F.J., Walker,
USN	R.L. & Tillerman, T.M.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	dm_number	notes	coord_arcsec_2000
21441+2845	STF2822	AB	2006	695	312	1.8	4.75	6.18	F6V G2V	+28 4169	NOD	214408.57+284433.4
21441+2845	STF2822	AB	2007	698	312	1.8	4.75	6.18	F6V G2V	+28 4169	NOD	214408.57+284433.4
21441+2845	STF2822	AB	2008	703	315	1.9	4.75	6.18	F6V G2V	+28 4169	NOD	214408.57+284433.4
21441+2845	STF2822	AB	2009	704	314	1.8	4.75	6.18	F6V G2V	+28 4169	NOD	214408.57+284433.4
21441+2845	STF2822	AB	2010	718	313	1.7	4.75	6.18	F6V G2V	+28 4169	NOD	214408.57+284433.4
21441+2845	STF2822	AB	2011	722	316	2.0	4.75	6.18	F6V G2V	+28 4169	NOD	214408.57+284433.4
21441+2845	STF2822	AB	2012	723	316	1.6	4.75	6.18	F6V G2V	+28 4169	NOD	214408.57+284433.4
21441+2845	STF2822	AB	2013	735	318	1.7	4.75	6.18	F6V G2V	+28 4169	NOD	214408.57+284433.4
21441+2845	STF2822	AB	2014	708	319	1.7	4.75	6.18	F6V G2V	+28 4169	NOD	214408.57+284433.4
21441+2845	STF2822	AB	2015	713	319	1.7	4.75	6.18	F6V+G2V	+28 4169	NO	214408.57+284433.4
21441+2845	STF2822	AB	2016	720	321	1.8	4.75	6.18	F6V+G2V	+28 4169	NO	214408.57+284433.4
21441+2845	STF2822	AB	2017	725	322	1.7	4.75	6.18	F6V+G2V	+28 4169	NO	214408.57+284433.4
21441+2845	STF2822	AB	2018	726	321	1.6	4.75	6.18	F6V+G2V	+28 4169	NO	214408.57+284433.4
21441+2845	STF2822	AB	2019	729	322	1.6	4.75	6.18	F6V+G2V	+28 4169	NO	214408.57+284433.4
21441+2845	STF2822	AB	2020	734	325	1.6	4.75	6.18	F6V+G2V	+28 4169	NO	214408.57+284433.4
21441+2845	STF2822	AB	2022	736	325	1.6	4.75	6.18	F6V+G2V	+28 4169	NO	214408.57+284433.4

If you need more information about this double, apply for a data request form to the WDS.

Show	date	username	difficulty	separation	pa_estim	interest	seeing	notes
Show	25/07/22	oldscope	easy	separated		very interesting		A very nice double, difficult to find in light polluted skies. Best in steady air.
Show	23/08/02	oldscope	mean difficulty	separated		do not miss it!		Gear: Antique 1903 4-1/2â€� [~115mm] f/15 Brashear refractor (which made the cover of August Sky & Tele), hand driven EQ; Baader prism diagonal and Baader Hyperion 8-24 Zoom, plus a Televue 3-6 Zoom. This is a lovely kit for easy visual observing. Zoom eyepieces make double star viewing a real pleasure as you can get to the correct magnification very quickly without swapping a lot of eyepieces. The Baader zoom is exquisite with its wide field and superb optics. Its single drawback is that it is not parfocal. The Televue is almost perfectly parfocal, but its field of view is considerably narrower. It also has outstanding optics. Between the two, it gives me a range of magnification from 71X to 572X! The practical limit for the Brashear is 450X so I was covered for all seeing conditions. Oh, and I use an adjustable observing chair. Comfort is paramount. Site: My backyard in Forest Hills, Queens, NYC. Bortle 10 (ughh!) and surrounded by 3 story houses, but a clear horizon from about 25 degrees and higher in the East and South. “It’s complicated.â€� Conditions: 70F/21C, holding steady. 58% humidity, -0- clouds, -0- wind, transparency est. 7/10 (lightly hazy with a halo easily seen around the moon. The 97% waning moon was initially behind the neighbor’s house but rose into full view at 17deg 30min around 23:15 local time. Seeing (spoiler alert 9.5/10). Observation: Mu1 Cyg, 23:10-23:20 local time. It was perfectly placed at +55○ altitude. At Mag 4.49 (some listings have it at mag 4.6, but that is only the primary), it is too faint for me to see naked eye in the glow of NYC. But it shows up easily enough in my little finder, and it was easy to identify as it has a bright-ish nearby star, HIP107326 at mag 6.85. Centering on the brighter of the two stars in the finder, Mu1 Cyg was in the field of view of the Hyperion zoom at low power. I immediately dialed it down to 8mm, 214X and noticed that it was elongated. OK, found it! And the seeing looked encouraging. Swapping in the Televue 3-6 Zoom, at 6mm (286X), the double now separated cleanly. And it was rock-steady in the eyepiece. The primary’s Airy disk was sharp. One diffraction ring was visible in the light pollution/moon glow/light haze background. But the B component was clearly visible and well separated. The separation is listed as 1.51 in Stelle Doppie, but digging deeper, it was last measured in 2019 by Izmailov and the current Washington Double Star orb6 ephemeris lists it at 1.472 arcseconds for 2023, with a quality degree of 3, which is pretty good.* What makes this a tricky double is that the B component is sitting smack in the diffraction ring. I dialed the eyepiece to 5mm (343X) and clearly saw this. I also noticed that both Airy disks were still hard edged and dead steady. The seeing was superb and the Brashear lens had reached perfect thermal equalization with the unchanging temperature. I got the sense that this was a rare night. It is not often that I’m tempted to increase the magnification to 429X, using the 4mm setting, but last night the seeing held up and the view of this double was sublime. The color of the mag 4.69 primary Airy disk showed a very distinct pale creamy tinge and the fainter mag 6.12 secondary was a definite blue-gray. The seeing was so good that the diffraction ring was complete all around, not breaking up, and uniformly bright. The distinct impression was of a diamond ring surrounding the primary disk, with the secondary being the jewel. Amazing!
Show	20/06/15	oldscope	very difficult	separated		do not miss it!		This is a tough but gorgeous double. Hard to find but there is another star near it at almost the same mag.

Show	date	username	difficulty	sep	sep_sigma	pa	pa_sigma	delta_mag	#	notes
Show	12/07/30	northisup	very easy	2.00		320.00		1.50	1	bright and close

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Radius: auto 0.5" 0.8" 1" 2" 3" 5" 10" 15" 20" 25" 30" 35" 40" 45" 50" 55" 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' 15' 20' 30' 40' 50' 1° 2° 4° 5° 8° Components only

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

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 21441+2845 STF2822 AB 325 1.6 0 Show 21441+2845 STF2822 AC 292 76.6 0 Show 21441+2845 STF2822 AD 43 197.0 0 Show 21441+2845 FYM 25 AF 72 111.5 0 Show 21441+2845 FYM 25 AG 73 168.1 0 Show 21441+2845 STF2822 BD 45 196.7 1 Show 21441+2845 ES 521 DE 286 17.5 4 Show 21441+2845 FYM 25 DG 164 89.6 4 Show 21444+2824 KPP3373 242 2.1 21 Show 21461+2855 BRT 58 165 4.4 28 Show 21454+2819 J 3145 112 5.5 29 Show 21452+2914 UC 4550 15 42.5 33 Show 21418+2901 MLB 492 114 7.0 35 Show 21462+2817 MLB 540 AB 256 4.1 37 Show 21462+2817 MLB 540 AC 322 8.7 37 Show 21462+2817 ABH 152 AD 68 41.8 37 Show 21462+2817 ABH 152 AE 96 80.1 37 Show 21416+2911 GRV 493 184 44.7 43 Show 21469+2907 CVR 919 201 23.5 43 Show 21474+2855 AG 420 145 7.5 45 Show 21474+2834 A 300 AB 252 2.3 45 Show 21474+2834 A 300 AC 29 7.5 45 Show 21474+2834 A 300 AD 170 8.4 45 Show 21420+2924 MLB 539 171 4.8 48 Show 21423+2800 GRV 494 323 62.9 51 Show 21439+2751 HO 166 233 0.2 54 Show 21410+2920 STT 448 31 0.1 55 Show 21442+2942 MLB 493 330 8.6 57 Show 21480+2819 MLB 541 340 9.9 58 Show 21470+2930 GRV 503 331 20.4 60 Show 21473+2932 STJ 58 193 1.8 64 Show 21458+2945 DAM 236 143 5.9 65 Show 21455+2948 DAM 237 233 6.3 67 Show 21430+2951 KPP 498 58 3.9 68 Show 21420+2741 RAO 465 Aa,Ab 128 0.3 70 Show 21420+2741 RAO 465 AB 303 2.6 70 Show 21390+2826 ES 520 36 9.4 71 Show 21401+2928 BRT 57 137 5.0 72 Show 21458+2954 TDT3146 359 2.5 73 Show 21420+2951 MLB 720 140 7.2 73 Show 21457+2957 TDT3145 250 2.2 75 Show 21477+2740 CVR 922 225 9.9 80 Show 21435+2725 BKO 631 26 5.9 80 Show 21412+2955 GRV 491 21 31.4 81 Show 21435+2721 OSO 155 DG 304 6.1 82 Show 21435+2721 A 299 DE 95 999.9 82 Show 21435+2721 A 299 DF 26 145.8 82 Show 21453+2722 HO 606 93 18.4 85 Show 21435+2721 A 299 AB 66 1.1 85 Show 21435+2721 A 299 AD 64 374.5 85 Show 21435+2721 A 299 BC 338 0.1 85

	A	B	C	D	E	F
B	pa=309.7° sep=1.88"
C	pa=291.8° sep=76.60"	pa=291.4° sep=74.81"
D	pa=44.8° sep=197.77"	pa=45.4° sep=197.94"	pa=62.0° sep=238.36"
E	pa=40.2° sep=189.99"	pa=40.8° sep=190.02"	pa=58.9° sep=226.13"	pa=286.1° sep=17.47"
F	pa=71.8° sep=111.47"	pa=72.6° sep=112.48"	pa=87.9° sep=177.12"	pa=197.6° sep=110.68"	pa=188.6° sep=111.59"
G	pa=72.6° sep=168.11"	pa=73.1° sep=169.14"	pa=84.6° sep=232.55"	pa=166.9° sep=92.44"	pa=158.3° sep=102.12"	pa=74.2° sep=56.67"

Name	Mu1 Cyg		Coord arcsec 2000	214408.57+284433.4		Mag	4.75		Spectral class	F6V (yellow-white)
PmRA	260.00		PmDE	-243.0		SAO	89940		HIP	107310
Tycho2	2201-02078-2		HD	206826		HR	8309		GC	30438
BD	BD+28 4169		Bayer	Mu 1 Cygni		Bayer name	Mu1		Flamsteed	78 Cygni
Flamsteed name	78 Cyg

Tycho2	2201-02078-2		Pflag	P		RAmdeg	326.03572417		DEmdeg	28.74264837
PmRA	277.4		PmDE	-251.1		E RAmdeg	3		E DEmdeg	3
E pmRA	2.7		E pmDE	2.6		EpRAm	1991.91		EpDEm	1992.01
Num	3		Q RAmdeg	1.0		Q DEmdeg	0.3		Q pmRA	1.0
Q pmDE	0.3		BTmag	6.785		E BTmag	0.014		VTmag	6.179
E VTmag	0.009		Prox	20		TYC	T		HIP	107310
CCDM	B		RAdeg	326.03454639		DEdeg	28.74346778		EpRA 1990	1.92
EpDE 1990	2.00		E RAdeg	3.3		E DEdeg	3.7		Posflg	D
Corr	0.3

SAO	89940		DelFlag			RA1950			PmRA1950	0.022
DE1950			PmDE1950	-0.238		Vmag	4.7		SpType	F5
Double code			Source	70		CatNum	30438		DM	BD+28 4169
DMcomp	A		BDsup			HD	206826		M HD	0
GC	30438		RA1950rad	5.68062827		DE1950rad	0.49770008		PmRA2000	0.0222
PmDE2000	-0.241

Catalog	H		HIP	107310		Proxy	H		RAhms	21 44 08.40
DEdms	+28 44 35.6		Vmag	4.49		VarFlag			R Vmag	H
RAdeg	326.035		DEdeg	28.7432		AstroRef	A		Plx	44.64
CCDM	260.33 -		N CCDM	I		Nsys	2		Ncomp	2
MultFlag	C		Source			Qual	A		M HIP	AB
Theta	302		Rho	2.002		HD			BD	BD+28 4169
CD			CP			Dm number	+28 4169		VIred	0.55
SpType	F6V		R SpType			Coord arcsec 2000	214408.40+284435.6

HIP	107310		Sn	15		So	3		Nc	2
RArad	5.6903845519		DErad	0.5016638713		Plx	44.97		PmRA	260.72
PmDE	-243.21		E RArad	0.33		E DErad	0.3		E Plx	0.43
E pmRA	0.36		E pmDE	0.31		Hpmag			E Hpmag	0.0004
SHp	0.005		VA	0		BV	0.512		E BV	0.007
VI	0.58

Coord arcsec 2000	214408.46+284434.6		Coord calc	214408.46+284434.6		Mag	6.18		Spectral class	G2V (yellow)
PmRA	260.00		PmDE	-243.0		SAO	89939		HIP	107310
Tycho2	2201-02078-1		HD	206827		HR	8310		GC	30437
DM	BD+28 4169		Flamsteed	78 Cygni		Flamsteed name	78 Cyg		Delta magnitude	1.43

Tycho2	2201-02078-1		Pflag	P		RAmdeg	326.03572417		DEmdeg	28.74264837
PmRA	277.4		PmDE	-251.1		E RAmdeg	3		E DEmdeg	3
E pmRA	2.7		E pmDE	2.6		EpRAm	1991.91		EpDEm	1992.01
Num	3		Q RAmdeg	1.0		Q DEmdeg	0.3		Q pmRA	1.0
Q pmDE	0.3		BTmag	5.223		E BTmag	0.014		VTmag	4.745
E VTmag	0.009		Prox	20		TYC	T		HIP	107310
CCDM	A		RAdeg	326.03507722		DEdeg	28.74316972		EpRA 1990	1.92
EpDE 1990	2.02		E RAdeg	3.1		E DEdeg	3.3		Posflg	D
Corr	0.3

SAO	89939		DelFlag			RA1950			PmRA1950	0.0174
DE1950			PmDE1950	-0.215		Vmag	6.1		SpType	F5
Double code			Source	70		CatNum	30437		DM	BD+28 4169
DMcomp	B		BDsup			HD	206827		M HD	0
GC	30437		RA1950rad	5.68062366		DE1950rad	0.49769928		PmRA2000	0.0176
PmDE2000	-0.219

Catalog	H		HIP	107310		Proxy	H		RAhms	21 44 08.40
DEdms	+28 44 35.6		Vmag	4.49		VarFlag			R Vmag	H
RAdeg	326.035		DEdeg	28.7432		AstroRef	A		Plx	44.64
CCDM	260.33 -		N CCDM	I		Nsys	2		Ncomp	2
MultFlag	C		Source			Qual	A		M HIP	AB
Theta	302		Rho	2.002		HD			BD	BD+28 4169
CD			CP			Dm number	+28 4169		VIred	0.55
SpType	F6V		R SpType			Coord arcsec 2000	214408.40+284435.6

HIP	107310		Sn	15		So	3		Nc	2
RArad	5.6903845519		DErad	0.5016638713		Plx	44.97		PmRA	260.72
PmDE	-243.21		E RArad	0.33		E DErad	0.3		E Plx	0.43
E pmRA	0.36		E pmDE	0.31		Hpmag			E Hpmag	0.0004
SHp	0.005		VA	0		BV	0.512		E BV	0.007
VI	0.58

Coord arcsec 2000

214403.16+284501.8

Mag

12.93

Delta magnitude

8.18

Coordinate calculated

yes

Coord arcsec 2000	214419.17+284653.7		Coord calc	214419.17+284653.7		Mag	6.94		Spectral class	A5 (white)
PmRA	-1.00		PmDE	-54.0		SAO	89944		HIP	107326
Tycho2	2201-00786-1		HD	206874		GC	30442		BD	BD+28 4171
Delta magnitude	2.19

Tycho2	2201-00786-1		Pflag			RAmdeg	326.07993096		DEmdeg	28.78160134
PmRA	-1.1		PmDE	-54.5		E RAmdeg	4		E DEmdeg	4
E pmRA	1.1		E pmDE	1.0		EpRAm	1991.64		EpDEm	1991.67
Num	12		Q RAmdeg	0.8		Q DEmdeg	0.8		Q pmRA	0.6
Q pmDE	0.8		BTmag	7.329		E BTmag	0.015		VTmag	6.940
E VTmag	0.010		Prox	999		TYC	T		HIP	107326
CCDM			RAdeg	326.07993361		DEdeg	28.78172278		EpRA 1990	1.93
EpDE 1990	1.98		E RAdeg	3.5		E DEdeg	4.0		Posflg
Corr	0.2

SAO	89944		DelFlag			RA1950			PmRA1950	-0.0006
DE1950			PmDE1950	-0.048		Vmag	6.9		SpType	A5
Double code			Source	70		CatNum	30442		DM	BD+28 4171
DMcomp			BDsup			HD	206874		M HD	0
GC	30442		RA1950rad	5.68147705		DE1950rad	0.49832916		PmRA2000	-0.0005
PmDE2000	-0.052

Catalog	H		HIP	107326		Proxy			RAhms	21 44 19.18
DEdms	+28 46 54.2		Vmag	6.89		VarFlag			R Vmag	H
RAdeg	326.08		DEdeg	28.7817		AstroRef			Plx	12.99
CCDM	0.48		N CCDM	I		Nsys	2		Ncomp	1
MultFlag			Source			Qual			M HIP
Theta			Rho			HD			BD	BD+28 4171
CD			CP			Dm number	+28 4171		VIred	0.48
SpType	A5		R SpType			Coord arcsec 2000	214419.18+284654.2

HIP	107326		Sn	5		So	0		Nc	1
RArad	5.6911684504		DErad	0.5023360234		Plx	11.6		PmRA	-0.7
PmDE	-53.92		E RArad	0.44		E DErad	0.45		E Plx	0.63
E pmRA	0.53		E pmDE	0.54		Hpmag			E Hpmag	0.0011
SHp	0.008		VA	0		BV	0.411		E BV	0.015
VI	0.48

Coord arcsec 2000

214417.89+284658.5

Mag

13.13

Delta magnitude

8.38

Coordinate calculated

yes

Coord arcsec 2000	214416.62+284508.2		Mag	12.64		PmRA	6.00		PmDE	6.0
Delta magnitude	7.89		Coordinate calculated	yes

Coord arcsec 2000	214420.77+284523.7		Mag	13.77		PmRA	4.00		PmDE	2.0
Delta magnitude	9.02		Coordinate calculated	yes