21148+3803 AGC 13 AE

Coord 2000	21148+3803		Discov num	AGC  13		Comp	AE		Coord arcsec 2000	21 14 47.49 +38 02 43.1
Date first	1912		Date last	2012		Obs	6
Pa first	288		Pa last	256.8		P.A. Now (θ)	256.8°
Sep first	71.7		Sep last	86.9		Sep. Now (ρ)	86.9"
Mag pri	3.83		Mag sec	12.40		delta mag (ΔM)	8.57		Spectral class	F3V (yellow-white)
Pri motion ra	+196		Sec motion ra
Pri motion dec	+410		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Tau Cyg	71121	21 14 47 +38 02 43	AGC 13 AB	2017	358	190	1.1	3.83	6.57	2.74	Y
Show		71121	21 14 47 +38 02 43	AGC 13 AC	2012	11	211	73.0	3.83	12.20	8.37
Show		71121	21 14 47 +38 02 43	AGC 13 AB,D	2004	15	208	205.4	3.83	9.94	6.11
Show		71121	21 14 47 +38 02 43	AGC 13 AE	2012	6	257	86.9	3.83	12.40	8.57		<===
Show		71121	21 14 47 +38 02 43	AGC 13 AF	2012	37	184	89.5	3.83	11.95	8.12
Show		71121	21 14 47 +38 02 43	DAL 38 AG	2007	4	109	120.9	3.83	12.50	8.67
Show		71121	21 14 47 +38 02 43	LEP 100 AI	2002	2	77	534.5	3.83	16.02	12.19
Show		71121	21 14 47 +38 02 43	FYM 110 AJ	2012	3	127	49.7	3.83	14.00	10.17
Show		71121	21 14 47 +38 02 43	FYM 110 AK	2012	3	316	99.0	3.83	14.40	10.57
Show		71121	21 14 47 +38 02 43	FYM 110 AL	2012	2	290	32.8	3.83	14.90	11.07
Show			21 14 57 +38 02 09	DAL 38 GH	2015	7	108	8.6	12.50	13.20	0.70
Show			21 14 47 +38 01 14	JOD 20 Fa,Fb	2018	4	349	0.9	12.20	13.80	1.60

13-fold system
13 estimated visually detectable stars in this system

Constellation	Cygnus		SAO	71121		HIP	104887		Tycho2	3169-03876-1
HD	202444		HR	8130		GC	29723		ADS	14787
GL	Gl 822.1A		BD	BD+37 4240		Bayer	Tau Cygni		Bayer name	Tau Cyg
Flamsteed	65 Cygni		Flamsteed name	65 Cyg		Distance	20.34		Distance ly	66.35
Bayer greek	τ Cyg

discov_num	notes	refcode
AGC 13	tau Cyg = 65 Cyg.A is a Delta Scuti-type variable.
	Spectral types and masses of components assigned by ten Brummelaar et
	al., based on adaptive optics observations.	TtB2000
	Identification of the ascending node is probable although small
	variations of non-orbital origin superimpose on the RV. A is a Delta
	Scuti-type variable. A faint star listed as component F is physical;
	linear formula given by Heintz.
	See Baize & Petit (1989) catalog of doubles with variable component.	Baz1989d
	AC and AB,D: Optical pair, based on study of relative motion of the
	components using the method of apparent motion parameters.	Kiy2008
	AB: The Soderhjelm (1999) orbit predicts a separation of 0.734", but	Sod1999
	the magnitude difference (published value 2.7mag) may have been too
	great.	Hrt2009
	Calculated mass sum is 2.63 +/- 0.12 Msun. There is some indication of
	a substellar companion orbiting one of the two stars, but this is
	uncertain. This solution uses only a single Keplerian model.	Mut2010b
	AC: Rectilinear solution by Hurowitz et al. (2014).	USN2014b

refcode	metd	author	reference
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
Hrt2009	Su j	Hartkopf, W.I. & Mason, B.D.	2009AJ....138..813H
Hrt2009	+orb	AJ 138, 813, 2009
Kiy2008	-	Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S.	2008SvAL...32..405K
Kiy2008		SvAL 34, 405, 2008
Mut2010b	Kp -	Muterspaugh, M.W., Hartkopf, W.I., Lane. B.F., O'Connell, J., Williamson, M.,	2010AJ....140.1623M
Mut2010b		Kulkarni, S.R., Konacki, M., Burke, B.F., Colavita, M.M., Shao, M., &
Mut2010b		Wiktorowicz, S.J.
Mut2010b		AJ 140, 1623, 2010
Sod1999	orb -	Soderhjelm, S.	1999A&A...341..121S
Sod1999		A&A 341, 121, 1999
TtB2000	Ac j	ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr.,	2000AJ....119.2403T
TtB2000		Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.
TtB2000		AJ 119, 2403, 2000 (magnitude differences from Mt. Wilson AO)
USN2014b	lin -	Hurowitz, J.L., Hartkopf, W.I., & Mason, B.D.	2014IAUDS.183....1H
USN2014b		Inf. Circ. 183, 1, 2014

idgroup	discov	author
1	AGC	Clark, A.G.
2	DAL	Daley, J.A.
52	FYM	Fay, M.
79	JOD	Jodar, E., Perez-Garrido, A., Diaz-Sanchez, A., Villo, I., Rebolo, R., &
79	JOD	Perez-Prieto, J.A.
80	LEP	Lepine, S., Wallace, D., Shara, M., Moffat, A., & Niemela, V.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21148+3803	AGC 13	AE	2007	4	257	86.9	3.83	12.40	F3V	N D	211447.35+380239.6
21148+3803	AGC 13	AE	2012	6	257	86.9	3.83	12.40	F3V	N D	211447.35+380239.6

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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

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