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20177+4030
HDS2897

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20177+4030 HDS2897

20^h 17^m 44.44^s +40° 30' 24.7" P.A. 273.00 sep 0.3 mag 8.46,10.76 Sp G5 dist. 273.22 pc (891.24 l.y.)

Coord 2000	20177+4030		Discov num	HDS2897		Comp			Coord arcsec 2000	20 17 44.44 +40 30 24.7
Date first	1991		Date last	2012		Obs	6
Pa first	256		Pa last	273		P.A. Now (θ)	273°
Sep first	0.3		Sep last	0.3		Sep. Now (ρ)	0.3"
Mag pri	8.46		Mag sec	10.76		delta mag (ΔM)	2.3		Spectral class	G5 (yellow)
Pri motion ra	+011		Sec motion ra
Pri motion dec	+001		Sec motion dec
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	273		Precise sep	0.266		Constellation	Cygnus		SAO	49432
HIP	100037		Tycho2	3155-01552-1		Gaia DR2	2062339808314219392		HD	193246
BD	BD+40 4098		Distance	273.22		Distance ly	891.24

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20177+4030	HDS2897		1991	1	256	0.3	8.46	10.76	G5	D	201744.44+403024.7
20177+4030	HDS2897		2009	2	269	0.3	8.46	10.76	G5	D	201744.44+403024.7
20177+4030	HDS2897		2010	3	275	0.3	8.46	10.76	G5	D	201744.44+403024.7

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