15245+3723 STF 1938 Ba,Bb
15h 24m 30.89s +37° 20' 52.5" P.A. 2.00 sep 2.2 mag 7.09,7.63 Sp G0V dist. 36.06 pc (117.63 l.y.)
| Coord 2000 |
15245+3723 |
|
Discov num |
STF1938 |
|
Comp |
Ba,Bb |
|
Coord arcsec 2000 |
15 24 30.89 +37 20 52.5 |
|
| Date first |
1823 |
|
Date last |
2020 |
|
Obs |
763 |
|
| Pa first |
333 |
|
Pa last |
2.1 |
|
P.A. Now (θ) |
1° |
|
| Sep first |
1.8 |
|
Sep last |
2.2 |
|
Sep. Now (ρ) |
2.187" |
|
| Mag pri |
7.09 |
|
Mag sec |
7.63 |
|
delta mag (ΔM) |
0.54 |
|
Spectral class |
G0V (yellow) |
|
| Pri motion ra |
-154 |
|
Sec motion ra |
-151 |
|
| Pri motion dec |
+092 |
|
Sec motion dec |
+087 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.033 (< 0.3, Physical double)
This double is physical.
15245+3723 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
64686 |
15 24 30 +37 22 37 |
CHR 181 Aa,Ab |
2012 |
47 |
188 |
0.1 |
4.31 |
|
|
Y |
|
| Show |
Alkalurops |
64686 |
15 24 30 +37 22 37 |
STFA 28 AB |
2020 |
154 |
171 |
109.2 |
4.33 |
7.09 |
2.76 |
|
|
| Show |
|
64687 |
15 24 31 +37 20 52 |
STF 1938 Ba,Bb |
2020 |
763 |
2 |
2.2 |
7.09 |
7.63 |
0.54 |
Y |
<=== |
Quadruple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Bootes |
|
SAO |
64687 |
|
HIP |
75415 |
|
Tycho2 |
2570-01518-1 |
|
| Gaia DR2 |
1387349065960639232 |
|
HD |
137392 |
|
HR |
5734 |
|
GC |
20725 |
|
| ADS |
9626 |
|
GL |
NN 3904B |
|
BD |
BD+37 2637 |
|
Bayer |
Mu 2 Bootis |
|
| Bayer name |
Mu2 Boo |
|
Flamsteed |
51 Bootis |
|
Flamsteed name |
51 Boo |
|
Distance |
36.06 |
|
| Distance ly |
117.63 |
|
Bayer greek |
μ2 Boo |
|
ORBITAL ELEMENTS
| Period (P) | 256.5y | |
Periastron (T) | 1864.25y | |
Semi-major axis (a) | 1.45a | |
| Eccentricity (e) | 0.579 | |
Inclination (i) | 134.2° | |
Longitude of periastron (ω) | 338.7° | |
| Node (Ω) | 176.2° | |
Notes | n | |
Reference | Sca2013a | |
| Equinox | 2000 | |
Last observation | 2012 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
8.9 |
2.228 |
| 2001 |
8.5 |
2.229 |
| 2002 |
8.2 |
2.230 |
| 2003 |
7.8 |
2.231 |
| 2004 |
7.5 |
2.231 |
| 2005 |
7.2 |
2.231 |
| 2006 |
6.8 |
2.231 |
| 2007 |
6.5 |
2.231 |
| 2008 |
6.2 |
2.230 |
| 2009 |
5.8 |
2.229 |
| 2010 |
5.5 |
2.228 |
| 2011 |
5.1 |
2.227 |
| 2012 |
4.8 |
2.225 |
| 2013 |
4.5 |
2.223 |
| 2014 |
4.1 |
2.220 |
| 2015 |
3.8 |
2.218 |
| 2016 |
3.4 |
2.215 |
| 2017 |
3.1 |
2.212 |
| 2018 |
2.8 |
2.208 |
| 2019 |
2.4 |
2.205 |
| 2020 |
2.1 |
2.200 |
| 2021 |
1.7 |
2.196 |
| 2022 |
1.4 |
2.192 |
| 2023 |
1.0 |
2.187 |
| 2024 |
0.7 |
2.181 |
| 2025 |
0.3 |
2.176 |
| 2026 |
360.0 |
2.170 |
| 2027 |
359.6 |
2.164 |
| 2028 |
359.2 |
2.157 |
| 2029 |
358.9 |
2.151 |
| 2030 |
358.5 |
2.144 |
|
|
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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