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Doubles in session

Current system

19387+2444
POU3978

Selections

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

19387+2444 POU3978

19^h 38^m 43.41^s +24° 43' 54.2" P.A. 230.00 sep 13.7 mag 13.75,13.34

Coord 2000	19387+2444		Discov num	POU3978		Comp			Coord arcsec 2000	19 38 43.41 +24 43 54.2
Date first	1905		Date last	2015		Obs	9
Pa first	231		Pa last	230		P.A. Now (θ)	230°
Sep first	13.2		Sep last	13.7		Sep. Now (ρ)	13.7"
Mag pri	13.75		Mag sec	13.34		delta mag (ΔM)	0.41		Spectral class
Pri motion ra	+027		Sec motion ra	-033
Pri motion dec	+003		Sec motion dec	-032
Notes

rPM=1.511

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa

229.9

Precise sep

13.688

Constellation

Hydra

Gaia DR2

2021238891137062016

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19387+2444	POU3978		1997	2	230	13.5	13.75	13.34		D	193843.41+244354.2
19387+2444	POU3978		2001	3	230	13.6	13.75	13.34		D	193843.41+244354.2
19387+2444	POU3978		2010	4	230	13.6	13.75	13.34			193843.41+244354.2
19387+2444	POU3978		2015	5	230	13.6	13.75	13.34			193843.41+244354.2

If you need more information about this double, apply for a data request form to the WDS.