18278-8756 TDT 891 (HD 157945)

Coord 2000	18278-8756		Discov num	TDT 891		Comp			Coord arcsec 2000	18 27 49.49 -87 55 47.6
Date first	1991		Date last	2016		Obs	4
Pa first	76		Pa last	74.6		P.A. Now (θ)	74.6°
Sep first	3.0		Sep last	3.043		Sep. Now (ρ)	3.043"
Mag pri	10.38		Mag sec	10.89		delta mag (ΔM)	0.51		Spectral class	F8/G0 (yellow-white)
Pri motion ra	+003		Sec motion ra	+003
Pri motion dec	-025		Sec motion dec	-025
Notes

Nature of this double is uncertain.

Name	HD 157945		Constellation	Octans		Tycho2	9531-00347-1		Gaia DR2	6342268877613307520
HD	157945

No records found.

No records found.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18278-8756	TDT 891		1991	1	76	3.0	10.38	10.89			182749.49-875547.6
18278-8756	TDT 891		2015	2	75	3.0	10.38	10.89	F8/G0		182749.49-875547.6
18278-8756	TDT 891		2016	4	75	3.0	10.38	10.89	F8/G0		182749.49-875547.6

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No records found.


No records found.

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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
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Show name coord_2000 discov# comp pa sep dist(') Show 18278-8756 TDT 891 75 3.0 Show 18318-8704 KPP 892 275 7.4 53 Show 18252-8442 LDS 623 225 98.5 195 Show 18141-8325 RSS 478 35 8.4 272

	A
B	pa=7.5° sep=0.82"

Componente originario normalizzato	AB		Name	HD 157945		Coord arcsec 2000	182749.49-875547.6		Mag	10.38
Spectral class	F8/G0 (yellow-white)		PmRA	3.00		PmDE	-25.0		Tycho2	9531-00347-1
HD	157945

Tycho2	9531-00347-1		Pflag	P		RAmdeg	276.96284204		DEmdeg	-87.92981200
PmRA	2.7		PmDE	-24.8		E RAmdeg	37		E DEmdeg	36
E pmRA	1.7		E pmDE	1.6		EpRAm	1985.08		EpDEm	1985.12
Num	7		Q RAmdeg	0.9		Q DEmdeg	0.8		Q pmRA	0.9
Q pmDE	0.8		BTmag	10.919		E BTmag	0.043		VTmag	10.377
E VTmag	0.037		Prox	30		TYC	T		HIP
CCDM			RAdeg	276.95602500		DEdeg	-87.92982028		EpRA 1990	1.67
EpDE 1990	1.68		E RAdeg	25.0		E DEdeg	24.3		Posflg
Corr	0.1

Componente originario normalizzato	AB		Coord arcsec 2000	182749.69-875546.8		Mag	10.89		PmRA	3.00
PmDE	-25.0		Tycho2	9531-00347-2		Calc delta mag	0.51		Calc coord	yes

Tycho2	9531-00347-2		Pflag	P		RAmdeg	276.96284204		DEmdeg	-87.92981200
PmRA	2.7		PmDE	-24.8		E RAmdeg	37		E DEmdeg	36
E pmRA	1.7		E pmDE	1.6		EpRAm	1985.08		EpDEm	1985.12
Num	7		Q RAmdeg	0.9		Q DEmdeg	0.8		Q pmRA	0.9
Q pmDE	0.8		BTmag	11.483		E BTmag	0.064		VTmag	10.888
E VTmag	0.059		Prox	30		TYC	T		HIP
CCDM			RAdeg	276.97808639		DEdeg	-87.92959667		EpRA 1990	1.67
EpDE 1990	1.67		E RAdeg	38.9		E DEdeg	38.3		Posflg
Corr	0.1