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Doubles in session

Current system

21193+5837
STF 2790 AC

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.

21193+5837 STF 2790 AC

21^h 19^m 15.69^s +58° 37' 24.6" P.A. 183.00 sep 15.8 mag 5.85,15.20 Sp M1I+B2+B3 dist. 591.72 pc (1930.19 l.y.)

Coord 2000	21193+5837		Discov num	STF2790		Comp	AC		Coord arcsec 2000	21 19 15.69 +58 37 24.6
Date first	1893		Date last	2015		Obs	4
Pa first	183		Pa last	182.5		P.A. Now (θ)	182.5°
Sep first	15.4		Sep last	15.763		Sep. Now (ρ)	15.763"
Mag pri	5.85		Mag sec	15.20		delta mag (ΔM)	9.35		Spectral class	M1I+B2+B3 (red/blue-white)
Pri motion ra	-004		Sec motion ra
Pri motion dec	-003		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

21193+5837 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		33318	21 19 16 +58 37 25	BAG 9 Aa,Ab	2006	27	123	0.1	5.90	7.42	1.52
Show	V381 Cep	33318	21 19 16 +58 37 25	STF 2790 AB	2015	31	45	4.6	5.85	9.27	3.42
Show		33318	21 19 16 +58 37 25	STF 2790 AC	2015	4	183	15.8	5.85	15.20	9.35		<===
Show		33318	21 19 16 +58 37 25	STF 2790 AD	2015	11	352	74.8	5.85	10.07	4.22

Quintuple system
4 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Var name	V381 Cep		Constellation	Cepheus		SAO	33318		HIP	105259
Tycho2	3965-00453-1		Gaia DR2	2191213153886504704		HD	203338		HR	8164
ADS	14864		BD	BD+58 2249		Distance	591.72		Distance ly	1930.19