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Doubles in session

Current system

20155+5546
STI2515

Selections

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Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20155+5546 STI2515

20^h 15^m 30.39^s +55° 45' 58.7" P.A. 83.00 sep 13.5 mag 12.30,12.30

Coord 2000	20155+5546		Discov num	STI2515		Comp			Coord arcsec 2000	20 15 30.39 +55 45 58.7
Date first	1917		Date last	2015		Obs	10
Pa first	81		Pa last	83		P.A. Now (θ)	83°
Sep first	14.5		Sep last	13.5		Sep. Now (ρ)	13.5"
Mag pri	12.30		Mag sec	12.30		delta mag (ΔM)	0		Spectral class
Pri motion ra	-007		Sec motion ra	-007
Pri motion dec	+000		Sec motion dec	-004
Notes

rPM=0.496

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa

83.3

Precise sep

13.519

Constellation

Cygnus

Gaia DR2

2186153063933477248

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20155+5546	STI2515		1999	4	83	13.6	12.30	12.30		D	201530.39+554558.7
20155+5546	STI2515		2003	5	83	13.5	12.30	12.30		D	201530.39+554558.7
20155+5546	STI2515		2010	6	82	13.1	12.30	12.30			201530.39+554558.7
20155+5546	STI2515		2015	6	83	13.5	12.30	12.30			201530.39+554558.7

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