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20008+2949
BU 439 AB

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20008+2949 BU 439 AB

20^h 00^m 46.25^s +29° 49' 19.4" P.A. 222.00 sep 3.3 mag 7.89,12.70 Sp G0V

Coord 2000	20008+2949		Discov num	BU 439		Comp	AB		Coord arcsec 2000	20 00 46.25 +29 49 19.4
Date first	1876		Date last	2016		Obs	18
Pa first	250		Pa last	221.9		P.A. Now (θ)	221.9°
Sep first	2.7		Sep last	3.332		Sep. Now (ρ)	3.332"
Mag pri	7.89		Mag sec	12.70		delta mag (ΔM)	4.81		Spectral class	G0V (yellow)
Pri motion ra	+016		Sec motion ra
Pri motion dec	-115		Sec motion dec
Notes

Nature of this double is uncertain.

20008+2949 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		88066	20 00 46 +29 49 19	BU 439 AB	2016	18	222	3.3	7.89	12.70	4.81		<===
Show	HD 189796	88066	20 00 46 +29 49 19	BU 439 AC	2015	8	201	38.5	7.89	12.25	4.36
Show		88066	20 00 46 +29 49 19	FOX 9033 AD	2015	3	51	11.5	7.89	12.00	4.11
Show		88066	20 00 46 +29 49 19	FOX 9033 AE	2002	3	122	23.2	7.89	14.40	6.51

Quintuple system
5 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Cygnus		SAO	88066		Tycho2	2153-02502-1		Gaia DR2	2030169713022898048
HD	189796		ADS	13251