07187-2457 FIN 313 Aa,Ab
07h 18m 42.49s -24° 57' 15.8" P.A. 131.00 sep 0.1 mag 4.89,5.33 Sp O9II dist. 917.43 pc (2992.66 l.y.)
Coord 2000 |
07187-2457 |
|
Discov num |
FIN 313 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
07 18 42.49 -24 57 15.8 |
|
Date first |
1951 |
|
Date last |
2018 |
|
Obs |
48 |
|
Pa first |
110 |
|
Pa last |
131 |
|
P.A. Now (θ) |
131° |
|
Sep first |
0.2 |
|
Sep last |
0.101 |
|
Sep. Now (ρ) |
0.101" |
|
Mag pri |
4.89 |
|
Mag sec |
5.33 |
|
delta mag (ΔM) |
0.44 |
|
Spectral class |
O9II (blue) |
|
Pri motion ra |
-002 |
|
Sec motion ra |
|
|
Pri motion dec |
-001 |
|
Sec motion dec |
|
|
Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
07187-2457 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
173446 |
07 18 42 -24 57 16 |
FIN 313 Aa,Ab |
2018 |
48 |
131 |
0.1 |
4.89 |
5.33 |
0.44 |
|
<=== |
Show |
Tau CMa |
173446 |
07 18 42 -24 57 16 |
HJ 3948 AB |
2015 |
14 |
90 |
8.3 |
4.42 |
10.20 |
5.78 |
|
|
Show |
|
173446 |
07 18 42 -24 57 16 |
HJ 3948 AC |
2002 |
9 |
87 |
14.2 |
4.42 |
11.20 |
6.78 |
|
|
Show |
|
173446 |
07 18 42 -24 57 16 |
HJ 3948 AD |
2020 |
13 |
78 |
83.5 |
4.42 |
8.22 |
3.80 |
|
|
Show |
|
173446 |
07 18 42 -24 57 16 |
TOK 42 AE |
2018 |
12 |
87 |
0.9 |
5.33 |
9.70 |
4.37 |
|
|
Sextuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Var name |
NSV3528 CMa |
|
Constellation |
Canis Major |
|
SAO |
173446 |
|
HIP |
35415 |
|
Tycho2 |
6541-04204-1 |
|
Gaia DR2 |
5616537013676667392 |
|
HD |
57061 |
|
HR |
2782 |
|
GC |
9736 |
|
ADS |
5977 |
|
CD |
CD-24 5176 |
|
CP |
CP-24 2216 |
|
Bayer |
Tau Canis Majoris |
|
Bayer name |
Tau CMa |
|
Flamsteed |
30 Canis Majoris |
|
Flamsteed name |
30 CMa |
|
Distance |
917.43 |
|
Distance ly |
2992.66 |
|
Bayer greek |
τ CMa |
|
WDS 07187-2457 FIN 313 Aa,Ab : NOTES
discov_num |
notes |
refcode |
FIN 313 |
A: 30 CMa = tau CMa. A is Beta Lyrae-type system, probably variable. |
|
|
See discussion of the system by Sana et al. 2014). |
Sna2014 |
HJ 3948 |
van Leewen & van Genderen (1997 A&A 327, 1070) and Stickland et al. |
Stc1999 |
|
(1999) argue that the brighter Aa component of the visual Aa,Ab binary |
|
|
is a triple system consisting of a close 1.28-day eclipsing system |
|
|
orbiting a distant O star (the spectroscopic binary with a period of |
|
|
154.9 d). The visual Aa,Ab pair has slowly decreased in separation |
|
|
from 0".19 to 0".15 between 1977 and 1994. |
Msn1998a |
|
Classification of the D component is from Hoffleit & Warren (1991). |
Hof1991 |
|
1996.155: Date from J. Christou (private communication). |
|
REFERENCES
refcode |
metd |
author |
reference |
Hof1991 |
- |
Hoffleit, D. & Jaschek, C. |
1991bsc..book.....H |
Hof1991 |
|
The Bright Star Catalogue, Fifth Revised Edition (preliminary version), 1991 |
|
Msn1998a |
Sc j |
Mason, B.D., Gies, D.R., Hartkopf, W.I., Bagnuolo, Jr., W.G., |
1998AJ....115..821M |
Msn1998a |
|
ten Brummelaar, T.A., & McAlister, H.A. |
|
Msn1998a |
|
AJ 115, 821, 1998 |
|
Sna2014 |
Kv j |
Sana, H., LeBouquin, J.-B., Lacour, S., Berger, J.-P., Duvert, G., Gauchet, L., |
2014ApJS..215...15S |
Sna2014 |
+A |
Norris, B., Olofsson, J., Pickel, D., Zins, G., Absil, O., de Koter, A., |
|
Sna2014 |
|
Kratter, K., Schnurr, O., & Zinnecker, H. |
|
Sna2014 |
|
ApJS 215, 15, 2014 |
|
Sna2014 |
|
(NACO companions in Table 6 assumed physical if quoted probability of spurious |
|
Sna2014 |
|
detection <10%, optical if >90%, otherwise indeterminate) |
|
Stc1999 |
not - |
Stickland, D.J., Lloyd, C., & Sweet, I. |
1999Obs...118....7S |
Stc1999 |
|
Observatory 118, 7, 1999 |
|
DISCOVERER
idgroup |
discov |
author |
1 |
FIN |
Finsen, W.S. |
171 |
HJ |
Herschel, J.F.W. |
220 |
TOK |
Tokovinin, A.A. |
267 |
TOK |
Tokovinin, A.A., Balega, Y.Y., Pluzhnik, E.A., Shatsky, N.I., Gorynya, N.A., & |
267 |
TOK |
Weigelt, G. |
281 |
TOK |
Tokovinin, A., Cantarutti, R., Tighe, R., Schurter, P., van der Bliek, N., |
281 |
TOK |
Martinez, M., & Mondaca, E. |
349 |
TOK |
Tokovinin, A., Corbett, H., Fors, O., Howard, W., Law, N.M., Moe, M., |
349 |
TOK |
Ratzloff, J. & Walter, F.M. |
WDS HISTORIC DATA
coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
07187-2457 |
FIN 313 |
Aa,Ab |
2006 |
33 |
125 |
0.1 |
5.33 |
4.89 |
O9II |
N |
071842.49-245715.8 |
07187-2457 |
FIN 313 |
Aa,Ab |
2009 |
34 |
127 |
0.1 |
5.33 |
4.89 |
O9II |
N |
071842.49-245715.8 |
07187-2457 |
FIN 313 |
Aa,Ab |
2010 |
38 |
127 |
0.1 |
5.33 |
4.89 |
O9II |
N |
071842.49-245715.8 |
07187-2457 |
FIN 313 |
Aa,Ab |
2011 |
39 |
129 |
0.1 |
5.33 |
4.89 |
O9II |
N |
071842.49-245715.8 |
07187-2457 |
FIN 313 |
Aa,Ab |
2013 |
45 |
308 |
0.1 |
4.89 |
5.33 |
O9II |
N |
071842.49-245715.8 |
07187-2457 |
FIN 313 |
Aa,Ab |
2014 |
46 |
128 |
0.1 |
4.89 |
5.33 |
O9II |
N |
071842.49-245715.8 |
07187-2457 |
FIN 313 |
Aa,Ab |
2018 |
48 |
131 |
0.1 |
4.89 |
5.33 |
O9II |
N |
071842.49-245715.8 |
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WDS 07187-2457 FIN 313 Aa,Ab : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 07187-2457 FIN 313 Aa,Ab : MEASURES
No records found.
WDS 07187-2457 : VIRTUAL EYEPIECE
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WDS 07187-2457 : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.