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07187-2457
HJ 3948 AC

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

07187-2457 HJ 3948 AC

07^h 18^m 42.49^s -24° 57' 15.8" P.A. 87.00 sep 14.2 mag 4.42,11.20 Sp O9II dist. 917.43 pc (2992.66 l.y.)

Coord 2000	07187-2457		Discov num	HJ 3948		Comp	AC		Coord arcsec 2000	07 18 42.49 -24 57 15.8
Date first	1835		Date last	2002		Obs	9
Pa first	73		Pa last	86.9		P.A. Now (θ)	86.9°
Sep first	15.0		Sep last	14.2		Sep. Now (ρ)	14.2"
Mag pri	4.42		Mag sec	11.20		delta mag (ΔM)	6.78		Spectral class	O9II (blue)
Pri motion ra	-002		Sec motion ra
Pri motion dec	-001		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

07187-2457 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		173446	07 18 42 -24 57 16	FIN 313 Aa,Ab	2018	48	131	0.1	4.89	5.33	0.44
Show	Tau CMa	173446	07 18 42 -24 57 16	HJ 3948 AB	2015	14	90	8.3	4.42	10.20	5.78
Show		173446	07 18 42 -24 57 16	HJ 3948 AC	2002	9	87	14.2	4.42	11.20	6.78		<===
Show		173446	07 18 42 -24 57 16	HJ 3948 AD	2020	13	78	83.5	4.42	8.22	3.80
Show		173446	07 18 42 -24 57 16	TOK 42 AE	2018	12	87	0.9	5.33	9.70	4.37

Sextuple system
5 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Var name	NSV3528 CMa		Constellation	Canis Major		SAO	173446		HIP	35415
Tycho2	6541-04204-1		Gaia DR2	5616537013676667392		HD	57061		HR	2782
GC	9736		ADS	5977		CD	CD-24 5176		CP	CP-24 2216
Bayer	Tau Canis Majoris		Bayer name	Tau CMa		Flamsteed	30 Canis Majoris		Flamsteed name	30 CMa
Distance	917.43		Distance ly	2992.66		Bayer greek	τ CMa