20156+1958 ROE 101AB

Coord 2000	20156+1958		Discov num	ROE 101		Comp	AB		Coord arcsec 2000	20 15 36.94 +19 58 29.5
Date first	1895		Date last	2015		Obs	16
Pa first	53		Pa last	53		P.A. Now (θ)	53°
Sep first	12.8		Sep last	12.7		Sep. Now (ρ)	12.7"
Mag pri	8.38		Mag sec	9.60		delta mag (ΔM)	1.22		Spectral class	G8III (yellow)
Pri motion ra	-030		Sec motion ra	-027
Pri motion dec	-050		Sec motion dec	-052
Notes	N U V (See Notes, Proper motion indicates non-physical, Proper motion indicates physical)

Visually invisible, K-band or other infrared star rPM=0.062 (< 0.3, Physical double) This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		105904	20156+1958	ROE 101	AB	1895	2015	16	53	12.7	8.38	9.60	1.22		<===
Show		105904	20156+1958	ROE 101	AC	1916	2015	10	187	40.9	8.38	12.34	3.96
Show		105904	20156+1958	ROE 101	AD	1916	2015	11	289	11.9	8.38	11.30	2.92
Show		105904	20156+1958	ROE 101	AE	1916	2015	9	59	46.1	8.38	13.76	5.38

Quintuple system
5 visible stars in this system

Precise pa	53.1		Precise sep	12.708		Constellation	Sagitta		SAO	105904
Tycho2	1626-00831-1		Gaia DR2	04461110784		HD	192714

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20156+1958	ROE 101	AB	2000	5	52	12.9	8.38	9.60	G8III	DV	201536.94+195829.5
20156+1958	ROE 101	AB	2011	8	53	12.7	8.38	9.60	G8III	NUDV	201536.94+195829.5
20156+1958	ROE 101	AB	2013	10	52	12.9	8.38	9.60	G8III	NU V	201536.94+195829.5
20156+1958	ROE 101	AB	2015	11	53	12.7	8.38	9.60	G8III	NU V	201536.94+195829.5

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