11137+2008 STF 1517 AB (HD 97561)
11h 13m 40.99s +20° 07' 43.3" P.A. 313.00 sep 0.7 mag 7.54,8.02 Sp G5V dist. 54.5 pc (177.78 l.y.)
| Coord 2000 |
11137+2008 |
|
Discov num |
STF1517 |
|
Comp |
AB |
|
Coord arcsec 2000 |
11 13 40.99 +20 07 43.3 |
|
| Date first |
1829 |
|
Date last |
2018 |
|
Obs |
229 |
|
| Pa first |
288 |
|
Pa last |
312.7 |
|
P.A. Now (θ) |
312.7° |
|
| Sep first |
1.1 |
|
Sep last |
0.71 |
|
Sep. Now (ρ) |
0.71" |
|
| Mag pri |
7.54 |
|
Mag sec |
8.02 |
|
delta mag (ΔM) |
0.48 |
|
Spectral class |
G5V (yellow) |
|
| Pri motion ra |
-388 |
|
Sec motion ra |
-388 |
|
| Pri motion dec |
-123 |
|
Sec motion dec |
-125 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.005 (< 0.3, Physical double)
This double is physical.
11137+2008 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 97561 |
81725 |
11 13 41 +20 07 43 |
STF 1517 AB |
2018 |
229 |
313 |
0.7 |
7.54 |
8.02 |
0.48 |
Y |
<=== |
| Show |
|
81725 |
11 13 41 +20 07 43 |
BU 1431 AB,C |
2015 |
13 |
97 |
246.1 |
7.54 |
10.83 |
3.29 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 97561 |
|
Constellation |
Leo |
|
SAO |
81725 |
|
HIP |
54844 |
|
| Tycho2 |
1439-01487-1 |
|
HD |
97561 |
|
GC |
15428 |
|
ADS |
8094 |
|
| BD |
BD+20 2572 |
|
Distance |
54.5 |
|
Distance ly |
177.78 |
|
ORBITAL ELEMENTS
| Period (P) | 924y | |
Periastron (T) | 1393.49y | |
Semi-major axis (a) | 2.278a | |
| Eccentricity (e) | 0.489 | |
Inclination (i) | 93.6° | |
Longitude of periastron (ω) | 256.5° | |
| Node (Ω) | 120.4° | |
Notes | n | |
Reference | FMR2015b | |
| Equinox | 2000 | |
Last observation | 2011 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
320.4 |
0.569 |
| 2001 |
320.1 |
0.578 |
| 2002 |
319.7 |
0.586 |
| 2003 |
319.4 |
0.595 |
| 2004 |
319.1 |
0.603 |
| 2005 |
318.8 |
0.611 |
| 2006 |
318.5 |
0.620 |
| 2007 |
318.2 |
0.628 |
| 2008 |
318.0 |
0.637 |
| 2009 |
317.7 |
0.645 |
| 2010 |
317.4 |
0.654 |
| 2011 |
317.2 |
0.662 |
| 2012 |
316.9 |
0.671 |
| 2013 |
316.7 |
0.679 |
| 2014 |
316.4 |
0.688 |
| 2015 |
316.2 |
0.696 |
| 2016 |
316.0 |
0.704 |
| 2017 |
315.8 |
0.713 |
| 2018 |
315.5 |
0.721 |
| 2019 |
315.3 |
0.730 |
| 2020 |
315.1 |
0.738 |
| 2021 |
314.9 |
0.747 |
| 2022 |
314.7 |
0.755 |
| 2023 |
314.5 |
0.764 |
| 2024 |
314.4 |
0.772 |
| 2025 |
314.2 |
0.780 |
| 2026 |
314.0 |
0.789 |
| 2027 |
313.8 |
0.797 |
| 2028 |
313.6 |
0.806 |
| 2029 |
313.5 |
0.814 |
| 2030 |
313.3 |
0.822 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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