22156-4121 CHR 187 (Mu1 Gru)
22h 15m 36.88s -41° 20' 48.3" P.A. 263.00 sep 0.2 mag 6.68,5.20 Sp G8III dist. 84.25 pc (274.82 l.y.)
| Coord 2000 |
22156-4121 |
|
Discov num |
CHR 187 |
|
Comp |
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Coord arcsec 2000 |
22 15 36.88 -41 20 48.3 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
15 |
|
| Pa first |
76 |
|
Pa last |
263.1 |
|
P.A. Now (θ) |
276.8° |
|
| Sep first |
0.1 |
|
Sep last |
0.162 |
|
Sep. Now (ρ) |
0.128" |
|
| Mag pri |
6.68 |
|
Mag sec |
5.20 |
|
delta mag (ΔM) |
1.48 |
|
Spectral class |
G8III (yellow) |
|
| Pri motion ra |
+044 |
|
Sec motion ra |
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|
| Pri motion dec |
+022 |
|
Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
Mu1 Gru |
|
Constellation |
Grus |
|
SAO |
231055 |
|
HIP |
109908 |
|
| Tycho2 |
7999-01569-1 |
|
Gaia DR2 |
6569894104123050752 |
|
HD |
211088 |
|
HR |
8486 |
|
| GC |
31125 |
|
CD |
CD-4114810 |
|
CP |
CP-41 9761 |
|
Bayer |
Mu 1 Gruis |
|
| Bayer name |
Mu1 Gru |
|
FK5 |
3777 |
|
Distance |
84.25 |
|
Distance ly |
274.82 |
|
| Bayer greek |
μ1 Gru |
|
ORBITAL ELEMENTS
| Period (P) | 19.31y | |
Periastron (T) | 1991.67y | |
Semi-major axis (a) | 0.168a | |
| Eccentricity (e) | 0 | |
Inclination (i) | 68.3° | |
Longitude of periastron (ω) | 0° | |
| Node (Ω) | 77.1° | |
Notes | n | |
Reference | Tok2018i | |
| Equinox | 2000 | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
247.4 |
0.155 |
| 2001 |
254.9 |
0.167 |
| 2002 |
261.8 |
0.165 |
| 2003 |
269.7 |
0.147 |
| 2004 |
280.8 |
0.118 |
| 2005 |
300.3 |
0.084 |
| 2006 |
339.5 |
0.063 |
| 2007 |
24.5 |
0.075 |
| 2008 |
48.8 |
0.108 |
| 2009 |
61.6 |
0.139 |
| 2010 |
70.1 |
0.161 |
| 2011 |
77.2 |
0.168 |
| 2012 |
84.4 |
0.160 |
| 2013 |
93.0 |
0.138 |
| 2014 |
106.1 |
0.107 |
| 2015 |
131.1 |
0.074 |
| 2016 |
176.7 |
0.063 |
| 2017 |
215.0 |
0.086 |
| 2018 |
234.0 |
0.120 |
| 2019 |
244.8 |
0.148 |
| 2020 |
252.7 |
0.165 |
| 2021 |
259.6 |
0.167 |
| 2022 |
267.1 |
0.154 |
| 2023 |
276.8 |
0.128 |
| 2024 |
292.8 |
0.095 |
| 2025 |
324.8 |
0.066 |
| 2026 |
12.6 |
0.068 |
| 2027 |
43.0 |
0.097 |
| 2028 |
58.3 |
0.130 |
| 2029 |
67.7 |
0.155 |
| 2030 |
75.1 |
0.167 |
|
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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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