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19218+7708
HDS2740

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

19218+7708 HDS2740

19^h 21^m 45.04^s +77° 07' 41.6" P.A. 21.00 sep 0.3 mag 9.78,13.01 Sp K0 dist. 56.75 pc (185.12 l.y.)

Coord 2000	19218+7708		Discov num	HDS2740		Comp			Coord arcsec 2000	19 21 45.04 +77 07 41.6
Date first	1991		Date last	2011		Obs	8
Pa first	349		Pa last	21		P.A. Now (θ)	21°
Sep first	0.5		Sep last	0.3		Sep. Now (ρ)	0.3"
Mag pri	9.78		Mag sec	13.01		delta mag (ΔM)	3.23		Spectral class	K0 (yellow-orange)
Pri motion ra	+137		Sec motion ra
Pri motion dec	+385		Sec motion dec
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	21.1		Precise sep	0.274		Constellation	Draco		SAO	9407
HIP	95178		Tycho2	4588-01023-1		HD	183678		BD	BD+76 735
Distance	56.75		Distance ly	185.12

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19218+7708	HDS2740		1999	2	356	0.4	9.78	13.01	K0	D	192144.70+770738.2
19218+7708	HDS2740		2004	3	2	0.3	9.78	13.01	K0	D	192144.70+770738.2
19218+7708	HDS2740		2007	5	10	0.3	9.78	13.01	K0	D	192144.70+770738.2
19218+7708	HDS2740		2008	6	14	0.2	9.78	13.01	K0	D	192144.70+770738.2

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