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20396+1555
HJ 1554 AC
Sualocin

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

20396+1555 HJ 1554 AC (Sualocin)

20^h 39^m 38.25^s +15° 54' 43.4" P.A. 277.00 sep 48.4 mag 3.86,11.90 Sp B9IV dist. 77.82 pc (253.85 l.y.)

Coord 2000	20396+1555		Discov num	HJ 1554		Comp	AC		Coord arcsec 2000	20 39 38.25 +15 54 43.4
Date first	1828		Date last	2017		Obs	15
Pa first	278		Pa last	277.4		P.A. Now (θ)	277.4°
Sep first	35.0		Sep last	48.363		Sep. Now (ρ)	48.363"
Mag pri	3.86		Mag sec	11.90		delta mag (ΔM)	8.04		Spectral class	B9IV (blue-white)
Pri motion ra	+053		Sec motion ra	+033
Pri motion dec	+010		Sec motion dec	-005
Notes	N (See Notes)

rPM=0.464

Nature of this double is uncertain.

20396+1555 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		106357	20 39 38 +15 54 43	WCK 2 Aa,Ab	2019	92	289	0.1	3.86	6.43	2.57	Y
Show		106357	20 39 38 +15 54 43	CIA 23 Ab1,2	2019	11	250	0.0	3.86	6.43	2.57
Show		106357	20 39 38 +15 54 43	BU 298 AB	2015	11	233	35.5	3.86	13.40	9.54
Show	Sualocin	106357	20 39 38 +15 54 43	HJ 1554 AC	2017	15	277	48.4	3.86	11.90	8.04		<===
Show		106357	20 39 38 +15 54 43	BU 298 AD	2015	13	160	45.4	3.86	12.90	9.04
Show		106357	20 39 38 +15 54 43	BU 298 AE	2015	12	304	57.2	3.86	12.60	8.74
Show		106357	20 39 38 +15 54 43	BU 298 AF	2015	12	118	72.2	3.86	10.70	6.84

Octuple system
6 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Common name	Sualocin		Var name	NSV13207 Del		Constellation	Delphinus		SAO	106357
HIP	101958		Tycho2	1633-02442-1		Gaia DR2	1810711143450256128		HD	196867
HR	7906		GC	28780		ADS	14121		BD	BD+15 4222
Bayer	Alpha Delphini		Bayer name	Alp Del		Flamsteed	9 Delphini		Flamsteed name	9 Del
FK5	774		Distance	77.82		Distance ly	253.85		Bayer greek	α Del

Other names

SVALOCIN, Scalovin

Meaning

'Nicolaus' in reverse