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18239+5848
STF 2323 AC

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

18239+5848 STF 2323 AC

18^h 23^m 54.65^s +58° 48' 02.1" P.A. 19.00 sep 89.2 mag 5.06,7.95 Sp A1V dist. 56.47 pc (184.21 l.y.)

Coord 2000	18239+5848		Discov num	STF2323		Comp	AC		Coord arcsec 2000	18 23 54.65 +58 48 02.1
Date first	1823		Date last	2022		Obs	68
Pa first	22		Pa last	18.9		P.A. Now (θ)	18.9°
Sep first	90.2		Sep last	89.18		Sep. Now (ρ)	89.18"
Mag pri	5.06		Mag sec	7.95		delta mag (ΔM)	2.89		Spectral class	A1V (white)
Pri motion ra	-038		Sec motion ra	-041
Pri motion dec	+062		Sec motion dec	+061
Notes	N V (See Notes, Proper motion indicates physical)

rPM=0.043 (< 0.3, Physical double)

This double is physical.

18239+5848 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	39 Dra	30949	18 23 55 +58 48 02	STF 2323 AB	2022	147	347	3.7	5.06	8.07	3.01	Y
Show		30949	18 23 55 +58 48 02	STF 2323 AC	2022	68	19	89.2	5.06	7.95	2.89		<===
Show		30949	18 23 55 +58 48 02	STF 2323 AF	2008	3	80	150.5	5.06	12.90	7.84
Show		30949	18 23 55 +58 48 02	STF 2323 AG	2003	3	244	35.8	5.06	13.30	8.24
Show		30949	18 23 55 +58 48 02	STF 2323 AH	2000	2	93	44.2	5.06	14.40	9.34
Show		30949	18 23 55 +58 48 06	STF 2323 BC	2017	36	20	86.5	8.07	7.95	0.12
Show		30950	18 23 58 +58 49 26	STF 2323 CD	2015	10	68	198.2	7.90	11.00	3.10

Septuple system
7 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Draco		SAO	30949		HIP	90156		Tycho2	3916-01982-1
Gaia DR2	2157548616097840000		HD	170073		HR	6923		GC	25151
ADS	11336		BD	BD+58 1809		Flamsteed	39 Draconis		Flamsteed name	39 Dra
Distance	56.47		Distance ly	184.21