20307+2657 OPI  25AB

Coord 2000	20307+2657		Discov num	OPI  25		Comp	AB		Coord arcsec 2000	20 30 46.95 +26 57 34.6
Date first	1924		Date last	2015		Obs	9
Pa first	18		Pa last	29		P.A. Now (θ)	29°
Sep first	10.9		Sep last	14.0		Sep. Now (ρ)	14"
Mag pri	10.03		Mag sec	13.50		delta mag (ΔM)	3.47		Spectral class	G5 (yellow)
Pri motion ra	-036		Sec motion ra	+005
Pri motion dec	-043		Sec motion dec	-019
Notes

rPM=0.847 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20307+2657	OPI 25	AB	1924	2015	9	29	14.0	10.03	13.50	3.47		<===
Show			20307+2657	OPI 25	AC	1924	2015	9	324	27.0	10.03	12.50	2.47
Show			20307+2657	OPI 25	AD	1924	2015	9	357	103.7	10.03	11.80	1.77

Quadruple system
4 visible stars in this system

Precise pa	29		Precise sep	13.954		Constellation	Vulpecula		Tycho2	2165-00677-1
Gaia DR2	12032193920		HD	340458

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20307+2657	OPI 25	AB	1924	1	18	10.9	10.03	13.50	G5		203046.95+265734.6
20307+2657	OPI 25	AB	2000	2	27	13.3	10.03	13.50	G5		203046.95+265734.6
20307+2657	OPI 25	AB	2002	3	27	13.5	10.03	13.50	G5		203046.95+265734.6
20307+2657	OPI 25	AB	2012	3	30	13.9	10.03	13.50	G5		203046.95+265734.6
20307+2657	OPI 25	AB	2015	5	29	13.9	10.03	13.50	G5		203046.95+265734.6

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