07116-7959 HDS 998 (HD 57971)
07h 11m 36.72s -79° 59' 08.5" P.A. 74.00 sep 0.1 mag 9.08,11.61 Sp A2V dist. 162.6 pc (530.4 l.y.)
| Coord 2000 |
07116-7959 |
|
Discov num |
HDS 998 |
|
Comp |
|
|
Coord arcsec 2000 |
07 11 36.72 -79 59 08.5 |
|
| Date first |
1991 |
|
Date last |
2019 |
|
Obs |
7 |
|
| Pa first |
263 |
|
Pa last |
74.1 |
|
P.A. Now (θ) |
74.1° |
|
| Sep first |
0.1 |
|
Sep last |
0.095 |
|
Sep. Now (ρ) |
0.095" |
|
| Mag pri |
9.08 |
|
Mag sec |
11.61 |
|
delta mag (ΔM) |
2.53 |
|
Spectral class |
A2V (white) |
|
| Pri motion ra |
-011 |
|
Sec motion ra |
|
|
| Pri motion dec |
+009 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 57971 |
|
Constellation |
Mensa |
|
SAO |
256386 |
|
HIP |
34744 |
|
| Tycho2 |
9388-01280-1 |
|
Gaia DR2 |
5207981621195312256 |
|
HD |
57971 |
|
CP |
CP-79 245 |
|
| Distance |
162.6 |
|
Distance ly |
530.4 |
|
ORBITAL ELEMENTS
| Period (P) | 61.6y | |
Periastron (T) | 2021.5y | |
Semi-major axis (a) | 0.117a | |
| Eccentricity (e) | 0.095 | |
Inclination (i) | 40.5° | |
Longitude of periastron (ω) | 53.6° | |
| Node (Ω) | 34.7° | |
Notes | | |
Reference | Tok2019c | |
| Equinox | | |
Last observation | 2018 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
317.4 |
0.095 |
| 2001 |
324.0 |
0.096 |
| 2002 |
330.5 |
0.097 |
| 2003 |
336.9 |
0.098 |
| 2004 |
343.0 |
0.100 |
| 2005 |
349.0 |
0.102 |
| 2006 |
354.7 |
0.104 |
| 2007 |
0.3 |
0.105 |
| 2008 |
5.6 |
0.107 |
| 2009 |
10.8 |
0.108 |
| 2010 |
15.9 |
0.110 |
| 2011 |
20.9 |
0.110 |
| 2012 |
25.9 |
0.111 |
| 2013 |
30.9 |
0.110 |
| 2014 |
35.9 |
0.110 |
| 2015 |
41.0 |
0.108 |
| 2016 |
46.2 |
0.106 |
| 2017 |
51.7 |
0.104 |
| 2018 |
57.4 |
0.101 |
| 2019 |
63.5 |
0.098 |
| 2020 |
70.0 |
0.095 |
| 2021 |
76.9 |
0.092 |
| 2022 |
84.4 |
0.089 |
| 2023 |
92.3 |
0.086 |
| 2024 |
100.7 |
0.084 |
| 2025 |
109.5 |
0.082 |
| 2026 |
118.5 |
0.082 |
| 2027 |
127.5 |
0.082 |
| 2028 |
136.4 |
0.083 |
| 2029 |
144.9 |
0.085 |
| 2030 |
153.0 |
0.088 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
WDS 07116-7959 HDS 998 (HD 57971) : NOTES
No records found.
REFERENCES
| refcode |
metd |
author |
reference |
| Tok2019c |
St j |
Tokovinin, A., Mason, B.D., Mendez, R.A., Horch, E.P. & Briceno, C. |
2019AJ....158...48T |
| Tok2019c |
+orb |
AJ 158, 48, 2019 |
|
DISCOVERER
| idgroup |
discov |
author |
| 1 |
HDS |
Hipparcos Double Star (from additional DD list) |
WDS HISTORIC DATA
| coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
| 07116-7959 |
HDS 998 |
|
1991 |
1 |
263 |
0.1 |
9.08 |
11.61 |
A2V |
|
071136.72-795908.5 |
| 07116-7959 |
HDS 998 |
|
2015 |
3 |
45 |
0.1 |
9.08 |
11.61 |
A2V |
|
071136.72-795908.5 |
| 07116-7959 |
HDS 998 |
|
2016 |
4 |
38 |
0.1 |
9.08 |
11.61 |
A2V |
|
071136.72-795908.5 |
| 07116-7959 |
HDS 998 |
|
2018 |
6 |
64 |
0.1 |
9.08 |
11.61 |
A2V |
|
071136.72-795908.5 |
| 07116-7959 |
HDS 998 |
|
2019 |
7 |
74 |
0.1 |
9.08 |
11.61 |
A2V |
O |
071136.72-795908.5 |
If you need more information about this double, apply for a
data request form to the WDS.
WDS 07116-7959 HDS 998 (HD 57971) : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 07116-7959 HDS 998 (HD 57971) : MEASURES
No records found.
WDS 07116-7959 (HD 57971) : VIRTUAL EYEPIECE
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
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WDS 07116-7959 (HD 57971) : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.
