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Doubles in session

Current system

07187-2457
TOK 42 AE

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

07187-2457 TOK 42 AE

07^h 18^m 42.49^s -24° 57' 15.8" P.A. 87.00 sep 0.9 mag 5.33,9.70 Sp O9Ib dist. 917.43 pc (2992.66 l.y.)

Coord 2000	07187-2457		Discov num	TOK 42		Comp	AE		Coord arcsec 2000	07 18 42.49 -24 57 15.8
Date first	2004		Date last	2018		Obs	12
Pa first	87		Pa last	87.2		P.A. Now (θ)	87.2°
Sep first	0.9		Sep last	0.935		Sep. Now (ρ)	0.935"
Mag pri	5.33		Mag sec	9.70		delta mag (ΔM)	4.37		Spectral class	O9Ib (blue)
Pri motion ra	-002		Sec motion ra
Pri motion dec	+004		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