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Doubles in session

Current system

18031-5139
SKF 1420 AB
HD 164249

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

18031-5139 SKF 1420 AB (HD 164249)

18^h 03^m 03.41^s -51° 38' 56.4" P.A. 89.00 sep 6.5 mag 7.00,12.50 Sp F5V+M2Ve dist. 48.15 pc (157.07 l.y.)

Coord 2000	18031-5139		Discov num	SKF1420		Comp	AB		Coord arcsec 2000	18 03 03.41 -51 38 56.4
Date first	2000		Date last	2016		Obs	7
Pa first	88		Pa last	89.1		P.A. Now (θ)	89.1°
Sep first	6.4		Sep last	6.494		Sep. Now (ρ)	6.494"
Mag pri	7.00		Mag sec	12.50		delta mag (ΔM)	5.5		Spectral class	F5V+M2Ve (yellow-white/red)
Pri motion ra	+003		Sec motion ra
Pri motion dec	-087		Sec motion dec
Notes

Nature of this double is uncertain.

18031-5139 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 164249	245201	18 03 03 -51 38 56	SKF 1420 AB	2016	7	89	6.5	7.00	12.50	5.50		<===
Show		245201	18 03 03 -51 38 56	CVN 57 AC	2004	1	199	7.4	5.91	19.20	13.29
Show		245201	18 03 03 -51 38 56	CVN 57 AD	2004	1	178	9.7	5.91	19.80	13.89
Show		245201	18 03 03 -51 38 56	CVN 57 AE	2004	1	322	10.1	5.91	20.40	14.49
Show		245201	18 03 03 -51 38 56	CVN 57 AF	2004	1	46	11.2	5.91	20.50	14.59
Show		245201	18 03 03 -51 38 56	CVN 57 AG	2004	1	18	11.2	5.91	19.20	13.29
Show		245201	18 03 03 -51 38 56	CVN 57 AH	2004	1	37	13.0	5.91	20.90	14.99
Show		245201	18 03 03 -51 38 56	CVN 57 AI	2004	1	139	14.6	5.91	17.90	11.99
Show		245201	18 03 03 -51 38 56	CVN 57 AJ	2004	1	139	14.8	5.91	17.50	11.59

Decuple system
10 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	HD 164249		Constellation	Ara		SAO	245201		HIP	88399
Tycho2	8369-01619-1		Gaia DR2	6702775135228913280		HD	164249		GC	24531
CD	CD-5111312		CP	CP-5110709		Distance	48.15		Distance ly	157.07