11387+4507 STF 1561 AB (HD 101177)
11h 38m 44.90s +45° 06' 30.3" P.A. 246.00 sep 8.9 mag 6.53,8.23 Sp G0V+K2V dist. 23.25 pc (75.84 l.y.)
| Coord 2000 |
11387+4507 |
|
Discov num |
STF1561 |
|
Comp |
AB |
|
Coord arcsec 2000 |
11 38 44.90 +45 06 30.3 |
|
| Date first |
1782 |
|
Date last |
2019 |
|
Obs |
161 |
|
| Pa first |
270 |
|
Pa last |
245.7 |
|
P.A. Now (θ) |
245.7° |
|
| Sep first |
12.5 |
|
Sep last |
8.916 |
|
Sep. Now (ρ) |
8.916" |
|
| Mag pri |
6.53 |
|
Mag sec |
8.23 |
|
delta mag (ΔM) |
1.7 |
|
Spectral class |
G0V+K2V (yellow/yellow-orange) |
|
| Pri motion ra |
-594 |
|
Sec motion ra |
-571 |
|
| Pri motion dec |
+015 |
|
Sec motion dec |
-001 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.047 (< 0.3, Physical double)
This double is physical.
11387+4507 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 101177 |
43841 |
11 38 45 +45 06 30 |
STF 1561 AB |
2019 |
161 |
246 |
8.9 |
6.53 |
8.23 |
1.70 |
Y |
<=== |
| Show |
|
43841 |
11 38 45 +45 06 30 |
STF 1561 AC |
2015 |
28 |
90 |
176.8 |
6.53 |
9.46 |
2.93 |
|
|
| Show |
|
43841 |
11 38 45 +45 06 30 |
STF 1561 AD |
2015 |
5 |
76 |
718.2 |
6.53 |
7.56 |
1.03 |
|
|
| Show |
|
43841 |
11 38 45 +45 06 30 |
STF 1561 AE |
2015 |
13 |
338 |
60.7 |
6.53 |
12.08 |
5.55 |
|
|
| Show |
|
|
11 38 44 +45 06 27 |
STF 1561 BC |
2015 |
20 |
89 |
179.6 |
8.23 |
9.46 |
1.23 |
|
|
| Show |
|
|
11 38 44 +45 06 27 |
STF 1561 BE |
2015 |
10 |
347 |
61.7 |
8.23 |
12.08 |
3.85 |
|
|
| Show |
|
|
11 39 00 +45 06 31 |
STF 1561 CD |
2015 |
6 |
72 |
553.1 |
9.46 |
7.56 |
1.90 |
|
|
Quintuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 101177 |
|
Constellation |
Ursa Major |
|
SAO |
43841 |
|
HIP |
56809 |
|
| Tycho2 |
3452-01883-1 |
|
HD |
101177 |
|
HR |
4486 |
|
GC |
15976 |
|
| ADS |
8250 |
|
GL |
Gl 433.2A |
|
BD |
BD+45 1947 |
|
Distance |
23.25 |
|
| Distance ly |
75.84 |
|
ORBITAL ELEMENTS
| Period (P) | 1584.3798y | ± 558.908 |
Periastron (T) | 1548.9975y | ± 135.2553 |
Semi-major axis (a) | 13.88028a | ± 8.48814 |
| Eccentricity (e) | 0.63268 | ± 0.23949 |
Inclination (i) | 108.687° | ± 10.571 |
Longitude of periastron (ω) | 273.84° | ± 16.662 |
| Node (Ω) | 288.192° | ± 9.031 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
248.4 |
9.126 |
| 2001 |
248.2 |
9.115 |
| 2002 |
248.1 |
9.104 |
| 2003 |
248.0 |
9.094 |
| 2004 |
247.8 |
9.083 |
| 2005 |
247.7 |
9.072 |
| 2006 |
247.6 |
9.062 |
| 2007 |
247.4 |
9.051 |
| 2008 |
247.3 |
9.040 |
| 2009 |
247.2 |
9.030 |
| 2010 |
247.0 |
9.019 |
| 2011 |
246.9 |
9.008 |
| 2012 |
246.8 |
8.998 |
| 2013 |
246.6 |
8.987 |
| 2014 |
246.5 |
8.976 |
| 2015 |
246.4 |
8.966 |
| 2016 |
246.2 |
8.955 |
| 2017 |
246.1 |
8.944 |
| 2018 |
246.0 |
8.934 |
| 2019 |
245.8 |
8.923 |
| 2020 |
245.7 |
8.912 |
| 2021 |
245.5 |
8.902 |
| 2022 |
245.4 |
8.891 |
| 2023 |
245.3 |
8.880 |
| 2024 |
245.1 |
8.870 |
| 2025 |
245.0 |
8.859 |
| 2026 |
244.9 |
8.848 |
| 2027 |
244.7 |
8.838 |
| 2028 |
244.6 |
8.827 |
| 2029 |
244.4 |
8.816 |
| 2030 |
244.3 |
8.806 |
|
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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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