20210-1447 HJ 2948 DE

Coord 2000	20210-1447		Discov num	HJ 2948		Comp	DE		Coord arcsec 2000	20 20 53.25 -14 46 08.7
Date first	1823		Date last	2000		Obs	8
Pa first	300		Pa last	320.7		P.A. Now (θ)	320.7°
Sep first	8.0		Sep last	3.905		Sep. Now (ρ)	3.905"
Mag pri	13.70		Mag sec	14.40		delta mag (ΔM)	0.7		Spectral class
Pri motion ra	+015		Sec motion ra	-058
Pri motion dec	-034		Sec motion dec	+060
Notes	N (See Notes)

rPM=1.426 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		163481	20 21 01 -14 46 53	BLA 7 Aa,Ab	2021	15	35	0.1	3.10	4.90	1.80	Y
Show	Dabih	163481	20 21 01 -14 46 53	STFA 52 AB	2016	42	266	205.2	3.15	6.08	2.93
Show		163481	20 21 01 -14 46 53	STFA 52 AC	2012	11	133	226.1	3.15	8.83	5.68
Show		163481	20 21 01 -14 46 53	HJ 2948 AD	2000	3	292	115.9	3.15	12.96	9.81
Show		163471	20 20 47 -14 47 06	BAR 12 Ba,Bb	2021	30	52	0.4	6.16	9.14	2.98	Y
Show		163471	20 20 47 -14 47 06	STFA 52 BC	2015	14	111	396.5	6.08	8.83	2.75
Show			20 20 53 -14 46 09	HJ 2948 DE	2000	8	321	3.9	13.70	14.40	0.70		<===

Septuple system
5 estimated visually detectable stars in this system

Constellation

Capricornus

Gaia DR2

6875990822675170560

discov_num	notes	refcode
BLA 7	Aa,Ab: bet 1 Cap = Dabih. A is an occultation and interferometric
	binary, and is physical with the multiple system STFA 52 at 205".
	First detected as an occultation binary by Evans & Fekel (1979),	Evn1979
	who derive an orbit based upon spectroscopic, occultation, and
	interferometric observations.
	Period and eccentricity for Mason et al. (1994) orbit adopted from	Msn1994
	Evans & Fekel (1979); other elements generated from occultation and
	speckle data.
	Hipparcos astrometric solution adopted some elements from the orbit of	HIP1997d
	Evans & Fekel (1979).
	Alden (1936) orbit adopted P, T, and e from the spectroscopic orbit	Ald1936b
	of Spencer Jones (Ann. Cape Obs. 10, pt. 8, 76, 1928)
	Alden orbit rejected from Fourth Orbit Catalog	Wor1983
	("object still suspected to be binary by some, but no even
	approximately reliable or complete elements yet available")
STFA 52	AB: H 6 28.	MEv2010
	A: bet 1 Cap = 9 Cap
	B: bet 2 Cap
HJ 2948	AD: mistakenly listed as BD pair.
BAR 12	Ba,Bb: Physical with bet Cap. A is an 8.7d SB and may eclipse; it is
	also an occultation double.
	Ba,Bb: Additional notes may be found in Barnard (1898).	Bar1898b

refcode	metd	author	reference
Ald1936b	orb -	Alden, H.L.	1936AJ.....45...82A
Ald1936b		AJ 45, 82, 1936
Bar1898b	Ma j	Barnard, E.E.	1898AJ.....19..113B
Bar1898b		AJ 19, 113, 1898
Evn1979	O j	Evans, D.S. & Fekel, F.C.	1979ApJ...228..497E
Evn1979	+orb	ApJ 228, 497, 1979
HIP1997d	orb -	Hipparcos	1997yCat.1239....0E
HIP1997d		Hipparcos Catalog, ESA SP-1200, 1997
HIP1997d		(DMSA/O Orbital Solutions)
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Msn1994	orb -	Mason, B.D.	1994PhDT........57M
Msn1994		Thesis, Georgia State University, 1994
Wor1983	-	Worley, C.E. & Heintz, W.D.	1983PUSNO..24g...1W
Wor1983		Pub. USNO 24, Pt. 7, 1983 (Fourth Orbit Catalog)

idgroup	discov	author
1	BLA	Blazit, A., Bonneau, D., Koechlin, L. & Labeyrie, A.
6	HJ	Herschel, J.F.W.
55	STF	Struve, F.G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20210-1447	HJ 2948	DE	1913	5	323	6.4	13.00	13.40		N	202053.90-144603.0
20210-1447	HJ 2948	DE	1998	6	322	3.9	13.70	14.40		N D	202053.25-144608.7
20210-1447	HJ 2948	DE	2000	8	321	3.9	13.70	14.40		N D	202053.25-144608.7

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