15565+5717 STF 1996 AB (HD 238521)

Coord 2000	15565+5717		Discov num	STF1996		Comp	AB		Coord arcsec 2000	15 56 31.13 +57 16 57.7
Date first	1830		Date last	2016		Obs	30
Pa first	109		Pa last	107.8		P.A. Now (θ)	107.8°
Sep first	19.2		Sep last	19.435		Sep. Now (ρ)	19.435"
Mag pri	10.22		Mag sec	10.65		delta mag (ΔM)	0.43		Spectral class	F8+K (yellow-white/yellow-orange)
Pri motion ra	-052		Sec motion ra	-052
Pri motion dec	+091		Sec motion dec	+090
Notes	N T (See Notes, Parallax indicates physical)

rPM=0.01 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 238521	29725	15 56 31 +57 16 58	STF 1996 AB	2016	30	108	19.4	10.22	10.65	0.43		<===
Show		29725	15 56 31 +57 16 58	STF 1996 AC	2015	16	141	162.0	10.22	10.59	0.37

Triple system
3 estimated visually detectable stars in this system

Name	HD 238521		Constellation	Draco		SAO	29725		Tycho2	3873-00526-1
Gaia DR2	1622560239801073920		HD	238521

discov_num	notes	refcode
STF1996	AB: HJL 231.	HJL1986

refcode	metd	author	reference
HJL1986	Pa -	Halbwachs, J.L.	1986A&AS...66..131H
HJL1986		A&AS 66, 131, 1986
HJL1986		(Possible CPM pairs from AGK2/3. Coarse astrometry, incl. mean 1950 dates, added
HJL1986		only for previously unknown pairs. Table 1: HJL 1 - 326, Table 2: HJL1001 - 1113)

idgroup	discov	author
1	STF	Struve, F.G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
15565+5717	STF1996	AB	2006	14	108	19.3	10.22	10.65	G	DV	155631.13+571657.7
15565+5717	STF1996	AB	2009	15	108	19.3	10.22	10.65	G	DV	155631.13+571657.7
15565+5717	STF1996	AB	2015	24	108	19.4	10.22	10.65	G	NVW	155631.13+571657.7
15565+5717	STF1996	AB	2016	29	108	19.4	10.22	10.65	F8+K	NT	155631.13+571657.7

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Radius: auto 0.5" 0.8" 1" 2" 3" 5" 10" 15" 20" 25" 30" 35" 40" 45" 50" 55" 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' 15' 20' 30' 40' 50' 1° 2° 4° 5° 8° Components only

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

FoV: 30" 1' 5' 15' 30' 1° 2° 4° 5° 8° Limit: 2 3 4 5 10 15 20 25 30 50 100 Primaries only
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(') Show 15565+5717 STF1996 AB 108 19.4 Show 15565+5717 STF1996 AC 141 162.0 Show 15587+5723 LDS2364 358 26.9 18 Show 15563+5656 LDS2363 166 7.8 22 Show 15549+5747 LDS2360 242 13.6 34 Show 15522+5729 LDS2359 219 172.5 38 Show 15533+5758 KPP3298 218 4.6 49 Show 15515+5640 CVR1651 337 3.4 55 Show 15490+5714 GRV1117 194 24.3 59 Show 16014+5806 SLW1157 263 61.6 63 Show 16012+5626 KPP3977 20 4.2 64 Show 15576+5820 CVR1655 293 4.8 65 Show 15506+5617 CVR1648 359 3.1 78 Show 16061+5652 TDS 802 306 0.9 82 Show 16033+5819 UC 3108 34 97.4 83 Show 15599+5557 CVR1658 231 3.0 85 Show 16058+5637 ARG 29 136 24.9 87 Show 16053+5810 KUI 71 12 0.6 89 Show 15456+5659 CVR 169 31 8.6 91 Show 15528+5848 TDS9673 343 0.8 96 Show 15485+5606 NSN 671 129 3.3 98 Show 16003+5856 STF2006 AB 177 1.5 104 Show 16003+5856 STF2006 AC 211 48.0 104 Show 16090+5756 ES 2651 139 10.6 109 Show 15536+5904 MLR 534 307 0.1 110 Show 16065+5604 YSC 110 142 0.2 110 Show 15509+5858 LDS6307 31 39.5 111 Show 16081+5605 STI2331 19 6.5 119 Show 15578+5916 PIN 10 157 121.7 120 Show 16038+5906 MLR 535 130 1.6 123 Show 15559+5920 TDS9694 136 0.5 123 Show 15433+5833 LDS2726 65 5.6 130 Show 15511+5514 CVR1649 188 5.0 131 Show 16126+5748 ES 1793 56 5.6 133 Show 15500+5515 SLW1140 342 22.2 134 Show 15476+5523 BU 946 129 2.3 137 Show 15468+5910 SLW1136 126 25.0 137 Show 15414+5821 RAO 338 224 0.2 137 Show 15568+5459 UC 215 68 22.1 138 Show 16108+5838 MLB 73 7 2.0 139 Show 15416+5613 STI2326 156 14.2 139 Show 16042+5923 ES 2650 210 10.9 140 Show 15389+5728 STTA141 AB 204 88.0 143 Show 15389+5728 STTA141 AC 335 234.1 143 Show 15389+5728 STTA141 AD 154 35.2 143 Show 16122+5613 SLW1166 122 161.3 144 Show 15407+5829 KPP1447 80 10.9 146 Show 16055+5511 TOI4045 45 0.3 147 Show 15598+5941 TDS 795 15 3.7 147 Show 15384+5717 CVR1637 5 3.2 147 Show 16026+5937 SLW1159 270 10.8 149

	A	B
B	pa=120.7° sep=11.63"
C	pa=156.3° sep=137.29"	pa=159.3° sep=128.00"

Name	HD 238521		Coord arcsec 2000	155631.13+571657.7		Mag	10.22		Spectral class	F8 (yellow-white)
PmRA	-52.00		PmDE	91.0		SAO	29725		Tycho2	3873-00526-1
HD	238521		DM	BD+57 1621

Tycho2	3873-00526-1		Pflag			RAmdeg	239.12970957		DEmdeg	57.28270930
PmRA	-52.9		PmDE	93.1		E RAmdeg	21		E DEmdeg	22
E pmRA	1.7		E pmDE	1.7		EpRAm	1987.29		EpDEm	1988.02
Num	8		Q RAmdeg	1.2		Q DEmdeg	1.2		Q pmRA	1.2
Q pmDE	1.2		BTmag	10.799		E BTmag	0.042		VTmag	10.223
E VTmag	0.036		Prox	194		TYC	T		HIP
CCDM			RAdeg	239.12993472		DEdeg	57.28249500		EpRA 1990	1.63
EpDE 1990	1.69		E RAdeg	23.5		E DEdeg	23.6		Posflg
Corr	-0.1

SAO	29725		DelFlag			RA1950			PmRA1950	-0.0074
DE1950			PmDE1950	0.087		Vmag	9.1		SpType	F8
Double code			Source	38		CatNum	8574		DM	BD+57 1621
DMcomp			BDsup			HD	238521		M HD	0
GC			RA1950rad	4.16893807		DE1950rad	1.00225104		PmRA2000	-0.0066
PmDE2000	0.089

Coord arcsec 2000	155632.36+571651.8		Mag	10.65		Spectral class	K (yellow-orange)		PmRA	-52.00
PmDE	90.0		Tycho2	3873-00735-1		Calc delta mag	0.43		Calc coord	yes

Tycho2	3873-00735-1		Pflag			RAmdeg	239.13922479		DEmdeg	57.28107251
PmRA	-53.8		PmDE	94.5		E RAmdeg	26		E DEmdeg	26
E pmRA	2.1		E pmDE	2.1		EpRAm	1986.66		EpDEm	1986.55
Num	7		Q RAmdeg	0.9		Q DEmdeg	0.8		Q pmRA	0.9
Q pmDE	0.8		BTmag	11.340		E BTmag	0.061		VTmag	10.652
E VTmag	0.050		Prox	194		TYC	T		HIP
CCDM			RAdeg	239.13944944		DEdeg	57.28084944		EpRA 1990	1.63
EpDE 1990	1.70		E RAdeg	34.4		E DEdeg	34.1		Posflg
Corr	-0.1

Coord arcsec 2000	155637.94+571452.0		Mag	10.59		PmRA	8.00		PmDE	-4.0
Calc delta mag	0.37		Calc coord	yes