21194+3814 KRV 42 AC (V1334 Cyg)

Coord 2000	21194+3814		Discov num	KRV  42		Comp	AC		Coord arcsec 2000	21 19 22.18 +38 14 14.9
Date first	1999		Date last	2015		Obs	2
Pa first	255		Pa last	255.6		P.A. Now (θ)	255.6°
Sep first	65.5		Sep last	65.67		Sep. Now (ρ)	65.67"
Mag pri	5.80		Mag sec	19.70		delta mag (ΔM)	13.9		Spectral class
Pri motion ra	+003		Sec motion ra
Pri motion dec	+000		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		71203	21 19 22 +38 14 15	CIA 5 Aa,Ab	2016	14	230	0.0	6.00	8.20	2.20	Y
Show		71203	21 19 22 +38 14 15	HO 286 AB	2005	31	237	0.2	6.60	6.60	0.00
Show	V1334 Cyg	71203	21 19 22 +38 14 15	KRV 42 AC	2015	2	256	65.7	5.80	19.70	13.90		<===

Quadruple system
3 estimated visually detectable stars in this system

Var name	V1334 Cyg		Spectr	F2Ib		Constellation	Cygnus		SAO	71203
HIP	105269		Tycho2	3169-03875-1		HD	203156		HR	8157
ADS	14859		BD	BD+37 4271		Distance	662.25		Distance ly	2160.26

discov_num	notes	refcode
HO 286	Often seen single. Rapid binary, distances small and quadrants
	uncertain. One component is a Cepheid, V1334 Cyg.
CIA 5	Aa,Ab: Gallenne et al. (2013) resolved the primary into an 8,as pair,
	and derived a combined spectroscopic/interferometric orbit. Spectral
	type of the companion is earlier than B5.5V.	CIA2013a
	Masses are 4.9 and 4.0 Msun. Estimated period = 5.3y,
	a = 6.3au = 0.01".	Evs2013
	Limb darkened diameter of Cepheid = 0.524 +/- 0.039 mas.
	Limb darkened diameter of Cepheid = 40.6 +/- 3.0 \rsun.
	Mass of A,B = 4.288 +/- 0.133, 4.040 +/- 0.048 \msun.
	Mass of secondary = 4.288 +/- 0.133 \msun.	GaA2018
	Mass of A,B = 4.6 +/- 0.7. 3.80 +/- 0.57 /msun.	Krv2019a

refcode	metd	author	reference
CIA2013a	Kc j	Gallenne, A., Monnier, J., Merand, A., Kervella, P., Kraus, S., Schaefer, G.H.,	2013A&A...552A..21G
CIA2013a		Gieren, W., Pietrzynski, G., Szabados, L., Che, X., Baron, F., Pedretti,E., et al.
CIA2013a		A&A 552, A21, 2013
Evs2013	Hp j	Evans, N.R., Bond, H.E., Schaefer, G.H., Mason, B.D., Karovska, M., & Tingle, E.	2013AJ....146...93E
Evs2013	+X	AJ 146, 93, 2013
GaA2018	Kc j	Gallenne, A., Kervella, P., Evans, N.R., Proffitt, C.R., Monnier, J.D., Merand, A.,	2018ApJ...867..121G
GaA2018	+orb	Nelan, E., Winston, E., Pietrzynski, G., Schaefer, G., Gieren, W., Anderson, R.I.,
GaA2018	+not	Borgniet, S., Kraus, S., Roettenbacher, R.M., Baron, F., Pilecki, B., Taormina, M.,
GaA2018		Graczyk, D., Mowlavi, N. & Eyer, L.
GaA2018		ApJ 867, 121, 2018
Krv2019a	orb+-	Kervella, P., Gallenne, A., Evans, N.R., Szabados, L., Arenouu, F., Merand, A.,	2019A&A...623A.116K
Krv2019a	+not	Proto, Y., Karczmarek, P., Nardetto, N., Gieren, W. & Pietrzynski, G.
Krv2019a		A&A 623, A116, 2019

idgroup	discov	author
1	HO	Hough, G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21194+3814	KRV 42	AC	2015	2	256	65.7	5.80	19.70		N	211922.18+381414.9

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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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