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Doubles in session

Current system

20154+1538
CHE 243 AB

Selections

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

20154+1538 CHE 243 AB

20^h 15^m 23.34^s +15° 38' 15.3" P.A. 222.00 sep 24.0 mag 10.91,13.52

Coord 2000	20154+1538		Discov num	CHE 243		Comp	AB		Coord arcsec 2000	20 15 23.34 +15 38 15.3
Date first	1910		Date last	2015		Obs	11
Pa first	222		Pa last	221.6		P.A. Now (θ)	221.6°
Sep first	24.4		Sep last	24.031		Sep. Now (ρ)	24.031"
Mag pri	10.91		Mag sec	13.52		delta mag (ΔM)	2.61		Spectral class
Pri motion ra	-002		Sec motion ra	-018
Pri motion dec	-004		Sec motion dec	+011
Notes

rPM=1.04

This double is not physical.

20154+1538 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 15 23 +15 38 15	CHE 243 AB	2015	11	222	24.0	10.91	13.52	2.61		<===
Show			20 15 23 +15 38 15	CHE 243 AC	2015	11	205	26.6	10.91	13.52	2.61

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation

Delphinus

Tycho2

1618-01401-1

Gaia DR2

1808425396221181184

HD

355245