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18239+5848
STF 2323 AF

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

18239+5848 STF 2323 AF

18^h 23^m 54.65^s +58° 48' 02.1" P.A. 80.00 sep 150.5 mag 5.06,12.90 Sp A1V dist. 56.47 pc (184.21 l.y.)

Coord 2000	18239+5848		Discov num	STF2323		Comp	AF		Coord arcsec 2000	18 23 54.65 +58 48 02.1
Date first	1910		Date last	2008		Obs	3
Pa first	80		Pa last	80		P.A. Now (θ)	80°
Sep first	150.5		Sep last	150.5		Sep. Now (ρ)	150.5"
Mag pri	5.06		Mag sec	12.90		delta mag (ΔM)	7.84		Spectral class	A1V (white)
Pri motion ra	-037		Sec motion ra	+005
Pri motion dec	+062		Sec motion dec	-010
Notes	N (See Notes)

rPM=1.154

This double is not 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