22544+5538 ES 691 AD

Coord 2000	22544+5538		Discov num	ES  691		Comp	AD		Coord arcsec 2000	22 54 24.72 +55 39 44.7
Date first	1908		Date last	2015		Obs	9
Pa first	276		Pa last	272.3		P.A. Now (θ)	272.3°
Sep first	20.8		Sep last	20.568		Sep. Now (ρ)	20.568"
Mag pri	10.45		Mag sec	13.53		delta mag (ΔM)	3.08		Spectral class
Pri motion ra	+012		Sec motion ra	-006
Pri motion dec	+002		Sec motion dec	-008
Notes	N (See Notes)

rPM=1.693 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			22 54 25 +55 39 45	ES 691 AB	2015	9	276	7.0	10.45	13.50	3.05
Show			22 54 25 +55 39 45	HJ 1830 AC	2016	14	83	13.6	10.45	11.40	0.95
Show			22 54 25 +55 39 45	ES 691 AD	2015	9	272	20.6	10.45	13.53	3.08		<===
Show			22 54 22 +55 39 45	ES 691 DC	2015	9	88	34.0	13.53	11.40	2.13

Quadruple system
4 estimated visually detectable stars in this system

Constellation

Lacerta

Tycho2

3989-00231-1

Gaia DR2

2003719826915656960

discov_num	notes	refcode
HJ 1830	The 1917.81 Vatican Observatory measure of AC was originally	Vat1926
	attributed to DC.

refcode	metd	author	reference
Vat1926	Ma j	Vatican Obs.	.
Vat1926	+Pa	Astrographic Cat. Appendix 3, 1926, 1930

idgroup	discov	author
1	ES	Espin, T.E.
96	HJ	Herschel, J.F.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
22544+5538	ES 691	AD	2006	3	272	20.5	10.45	13.53		D	225424.72+553944.7
22544+5538	ES 691	AD	2015	6	272	20.6	10.45	13.53		N	225424.72+553944.7

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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

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS