WDS 20500-1154 BRG 31

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20500-1154
BRG 31

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

WDS 20500-1154 BRG 31 : NOTES

discov_num	notes	refcode
BRG 31	2MASS J20500010-1154092 has a close companion detected with AstraLux,
	but it has not yet been confirmed through common proper motion.
	However, since the separation is quite small (~0.47") and the
	brightness and color of the companion is consistent with expectations,
	the system counts as binary for statistical purposes.	Jnn2012

REFERENCES

refcode	metd	author	reference
Jnn2012	Cl j	Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S.,	2012ApJ...754...44J
Jnn2012	+E2	Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T.
Jnn2012		ApJ 754, 44, 2012 (some recalibrated measures published in Jnn2014b)	2014ApJS..214...17J

DISCOVERER

idgroup	discov	author
1	BRG	Bergfors, C. Brandner, W., Janson, M., Daemgen, S., Geissler, K., Henning, T.,
1	BRG	Hippler, S., Hormuth, F., Joergens, V., & Koehler, R.
10	BRG	Bergfors, C. Brandner, W., Daemgen, S., Biller, B., Hippler, S., Janson, M.,
10	BRG	Kudryavtseva, N., Geissler, K., Henning, T., & Koehler, R.
11	BRG	Bergfors, C. Brandner, W., Bonnefoy, M., Schlieder, J., Janson, M., Henning, Th. &
11	BRG	Chauvin, G.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20500-1154	BRG 31		2008	1	348	0.5	12.99		M3.5 M4.5	DR	205000.10-115409.2
20500-1154	BRG 31		2010	3	343	0.4	12.99		M3.5 M4.5	NV R	205000.10-115409.2

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