20434+3535 ISM 5 AB

Coord 2000	20434+3535		Discov num	ISM   5		Comp	AB		Coord arcsec 2000	20 43 24.20 +35 35 16.1
Date first	1990		Date last	1990		Obs	1
Pa first	145		Pa last	145.3		P.A. Now (θ)	145.3°
Sep first	0.0		Sep last	0.048		Sep. Now (ρ)	0.048"
Mag pri	6.48		Mag sec			delta mag (ΔM)			Spectral class	F7Ib (yellow-white)
Pri motion ra	+000		Sec motion ra
Pri motion dec	-006		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		70423	20 43 24 +35 35 16	ISM 5 AB	1990	1	145	0.0	6.48				<===
Show	X Cyg	70423	20 43 24 +35 35 16	EVS 44 AC	2011	1	96	12.9	6.39	18.61	12.22
Show		70423	20 43 24 +35 35 16	EVS 44 AD	2011	1	298	14.8	6.39	16.33	9.94

Quadruple system
4 estimated visually detectable stars in this system

Var name	X Cyg		Constellation	Cygnus		SAO	70423		HIP	102276
Tycho2	2695-04136-1		Gaia DR2	1870258975238302208		HD	197572		HR	7932
GC	28886		BD	BD+35 4234		Distance	1538.46		Distance ly	5018.46

discov_num	notes	refcode
ISM 5	The Cepheid X Cyg.

refcode	metd	author	reference
Evs1993	C -	Udalski, A. & Evans, N.R.	1993AJ....106..348U
Evs1993		AJ 106, 348, 1993
Evs1994	C -	Evans, N.R. & Udalski, A.	1994AJ....108..653E
Evs1994		AJ 108, 653, 1994
Evs2005	Ha j	Evans, N.R., Schaefer, G., Bond, H., Bono, G., Karovska, M., Nelan, E., &	2005AAS...207.1104E
Evs2005		Sasselov, D.
Evs2005	+orb	AAS meeting 207, #11.04, 2006
Evs2006	H j	Evans, N.R., Franz, O., Massa, D., Mason, B., Walker, R.L., & Marovska, M.	2006PASP..118.1545E
Evs2006	+S	PASP 118, 1545, 2006
Evs2008	Ha j	Evans, N.R., Schaefer, G.H., Bond, H., Bono, G., Karovska, M., Nelan, E.,	2008AJ....136.1137E
Evs2008		Sasselov, D., & Mason, B.D.
Evs2008		AJ 136, 1137, 2008
Evs2009	Hs j	Evans, N.R., Massa, D., & Proffitt, C.	2009AJ....137.3700E
Evs2009	+E2	AJ 137, 3700, 2009
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
Evs2016a	H3 -	Evans, N.R., Bond, H.E., Schaefer, G.H., Mason, B.D., Tingle, E., Karovska, M., &	2016AJ....151..129E
Evs2016a		Pillitteri, I.
Evs2016a		AJ 151, 129, 2016
Evs2016a		(some theta values replaced with more precise values from Evs2016b)	2016AJ....151..108E
Evs2016b	H3 -	Evans, N.R., Pillitteri, I., Wolk, S., Karovska, M., Tingle, E., Guinan, E.,	2016AJ....151..108E
Evs2016b		Engle, S., Bond, H.E., Schaefer, G.H., & Mason, B.D.
Evs2016b		AJ 151, 108, 2016 (most measures also in Evs2016a)	2016AJ............E
Evs2018	H -	Evans, N.R., Karovska, M., Bond, H.E., Schaefer, G.H., Sahu, K.C., Mack, J.,	2018ApJ...863..187E
Evs2018	+orb	Nelan, E.P., Gallenne, A. & Tingle, E.D.
Evs2018		ApJ 863, 187, 2018
Evs2020	- -	Evans, N.R., Pillitteri, I., Molnar, L., Szabados, L., Plachy, E., Szabo, R.,	2020AJ....159..121E
Evs2020		Engle, S., Guinan, E., Wolk, S., Gunther, H.M., Neilson, H., Marengo, M., Matthews,
Evs2020		L.D., Moschou, S., Drake, J.J., Kashyap, V., Kervella, P., Tordai, T., Somogyi, P.
Evs2020		& Burki, G.
Evs2020		AJ 159, 121, 2020
Evs2020b	H3	Evans, N.R., Gunther, H.M., Bond, H.E., Schaefer, G.H., Mason, B.D., Karovska, M.,	2020ApJ...905...81E
Evs2020b		Tingle, E., Wolk, S., Engle, S., Guinan, E., Pillitteri, I., Proffitt, C.,
Evs2020b		Kervella, P. & Gallenne, A.
Evs2020b		ApJ 905, 81, 2020
Ism1992	Ig u	Ismailov, R.M.	1992A&AS...96..375I
Ism1992		A&AS 96, 375, 1992

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20434+3535	ISM 5	AB	1990	1	145	0.0	6.48		F7Ib	N	204324.20+353516.1

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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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