22173-0847 LDS 782 AB
22h 17m 18.96s -08° 48' 12.3" P.A. 216.00 sep 7.9 mag 12.62,14.67 Sp M4V+M5V
Coord 2000 |
22173-0847 |
|
Discov num |
LDS 782 |
|
Comp |
AB |
|
Coord arcsec 2000 |
22 17 18.96 -08 48 12.3 |
|
Date first |
1920 |
|
Date last |
2016 |
|
Obs |
20 |
|
Pa first |
225 |
|
Pa last |
215.6 |
|
P.A. Now (θ) |
215.6° |
|
Sep first |
7.0 |
|
Sep last |
7.9 |
|
Sep. Now (ρ) |
7.9" |
|
Mag pri |
12.62 |
|
Mag sec |
14.67 |
|
delta mag (ΔM) |
2.05 |
|
Spectral class |
M4V+M5V (red/red) |
|
Pri motion ra |
-437 |
|
Sec motion ra |
-437 |
|
Pri motion dec |
-219 |
|
Sec motion dec |
-219 |
|
Notes |
N
V
(See Notes, Proper motion indicates physical) |
|
This double is physical.
22173-0847 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
|
22 17 19 -08 48 12 |
LDS 782 AB |
2016 |
20 |
216 |
7.9 |
12.62 |
14.67 |
2.05 |
|
<=== |
Show |
|
|
22 17 19 -08 48 12 |
VGT 5 AC |
2010 |
2 |
110 |
2.6 |
8.20 |
|
|
|
|
Show |
|
|
22 17 19 -08 48 19 |
BEU 22 Ba,Bb |
2021 |
16 |
59 |
0.2 |
14.67 |
|
|
|
|
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
WDS 22173-0847 LDS 782 AB : NOTES
discov_num |
notes |
refcode |
LDS 782 |
AB: NLTT 53397/53398 |
Chm2004 |
|
This system counts as single in our statistics, even though it appears |
|
|
to be a triple system in reality. The reason for this is that the A |
|
|
component was the AstraLux target, and the BC pair at ~7.8" is outside |
|
|
of the completeness cut-off at 6". Since the BC pair is visible in the |
|
|
AstraLux images, we can nonetheless analyze it astrometrically. This |
|
|
pair was first reported by Beuzit et al. (2004) with rho = 0.978" and |
|
|
theta = 305.8deg. There are no error bars quoted, but if we assume |
|
|
that the quoted precision in decimal places corresponds to measurement |
|
|
precision, and adopt errors of 5 mas and 0.5deg, which should be |
|
|
conservative in that circumstance, we find that common proper motion |
|
|
can be confirmed at a 76 sigma confidence level. Hence, physical |
|
|
companionship can be confidently inferred, even if the errors should |
|
|
be substantially larger than what we have assumed. |
Jnn2012 |
REFERENCES
refcode |
metd |
author |
reference |
Chm2004 |
E - |
Chaname, J. & Gould, A. |
2004ApJ...601..289C |
Chm2004 |
|
ApJ 601, 289, 2004 |
|
Chm2004 |
|
(Photometry, coordinates, and astrometry from rNLTT. Astrometry from early |
|
Chm2004 |
|
versions of 2MASS and UCAC, with date given only as "circa 2000". Measures |
|
Chm2004 |
|
identical to discovery observations - predominantly close pairs - were assumed |
|
Chm2004 |
|
not new observations, so not included in WDS. Similar concerns when primary and |
|
Chm2004 |
|
secondary magnitudes or proper motions were the same.) |
|
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 |
BEU |
Beuzit, J.-L., Segransan, D., Forveille, T., Udry, S., Delfosse, X., Mayor, M., |
1 |
BEU |
Perrier, C., Hainaut, M.-C., et al. |
2 |
LDS |
Luyten p.m. catalog (from additional DD list) |
2 |
VGT |
Vogt, N., Schmidt, T.O.B., Neuhauser, R., Bedalov, A., Roell, T., Seifahrt, A., & |
2 |
VGT |
Mugrauer, M. |
3 |
VGT |
Vogt, N., Mugrauer, M., Neuhauser, R., Schmidt, T.O.B., Contreras-Quijada, A., & |
3 |
VGT |
Schmidt, J.G. |
WDS HISTORIC DATA
coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
22173-0847 |
LDS 782 |
AB |
2000 |
10 |
203 |
7.0 |
12.62 |
14.67 |
M4.5+M5 |
|
221718.96-084812.3 |
22173-0847 |
LDS 782 |
AB |
2008 |
12 |
220 |
7.8 |
12.62 |
14.67 |
M4.5+M5 |
N |
221718.96-084812.3 |
22173-0847 |
LDS 782 |
AB |
2010 |
15 |
214 |
7.9 |
12.62 |
14.67 |
M4.5 M5 |
NV |
221718.96-084812.3 |
22173-0847 |
LDS 782 |
AB |
2012 |
16 |
214 |
8.0 |
12.62 |
14.67 |
M4V+M5V |
NV |
221718.96-084812.3 |
22173-0847 |
LDS 782 |
AB |
2015 |
19 |
215 |
7.9 |
12.62 |
14.67 |
M4V+M5V |
NV |
221718.96-084812.3 |
22173-0847 |
LDS 782 |
AB |
2016 |
20 |
216 |
7.9 |
12.62 |
14.67 |
M4V+M5V |
NV |
221718.96-084812.3 |
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WDS 22173-0847 LDS 782 AB : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 22173-0847 LDS 782 AB : MEASURES
No records found.
WDS 22173-0847 : VIRTUAL EYEPIECE
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WDS 22173-0847 : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.