15234-5919 HJ 4757 (Gam Cir)
15h 23m 22.66s -59° 19' 14.5" P.A. 353.00 sep 0.8 mag 4.94,5.73 Sp B5IV+F8 dist. 137.55 pc (448.69 l.y.)
| Coord 2000 |
15234-5919 |
|
Discov num |
HJ 4757 |
|
Comp |
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Coord arcsec 2000 |
15 23 22.66 -59 19 14.5 |
|
| Date first |
1835 |
|
Date last |
2021 |
|
Obs |
76 |
|
| Pa first |
107 |
|
Pa last |
353.4 |
|
P.A. Now (θ) |
353.4° |
|
| Sep first |
1.0 |
|
Sep last |
0.822 |
|
Sep. Now (ρ) |
0.822" |
|
| Mag pri |
4.94 |
|
Mag sec |
5.73 |
|
delta mag (ΔM) |
0.79 |
|
Spectral class |
B5IV+F8 (blue-white/yellow-white) |
|
| Pri motion ra |
-010 |
|
Sec motion ra |
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| Pri motion dec |
-037 |
|
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 |
Gam Cir |
|
Constellation |
Circinus |
|
SAO |
242463 |
|
HIP |
75323 |
|
| Tycho2 |
8707-01990-1 |
|
Gaia DR2 |
5876786743052644480 |
|
HD |
136415 |
|
HR |
5704 |
|
| GC |
20663 |
|
CP |
CP-58 5908 |
|
Bayer |
Gamma Circini |
|
Bayer name |
Gam Cir |
|
| Distance |
137.55 |
|
Distance ly |
448.69 |
|
Bayer greek |
γ Cir |
|
ORBITAL ELEMENTS
| Period (P) | 600y | |
Periastron (T) | 2111.7y | |
Semi-major axis (a) | 1.275a | |
| Eccentricity (e) | 0.404 | |
Inclination (i) | 127.8° | |
Longitude of periastron (ω) | 218.7° | |
| Node (Ω) | 123.9° | |
Notes | n | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
10.7 |
0.823 |
| 2001 |
9.9 |
0.823 |
| 2002 |
9.1 |
0.822 |
| 2003 |
8.3 |
0.822 |
| 2004 |
7.5 |
0.822 |
| 2005 |
6.7 |
0.821 |
| 2006 |
5.8 |
0.821 |
| 2007 |
5.0 |
0.821 |
| 2008 |
4.2 |
0.821 |
| 2009 |
3.4 |
0.821 |
| 2010 |
2.6 |
0.821 |
| 2011 |
1.8 |
0.821 |
| 2012 |
1.0 |
0.821 |
| 2013 |
0.2 |
0.822 |
| 2014 |
359.4 |
0.822 |
| 2015 |
358.5 |
0.822 |
| 2016 |
357.7 |
0.823 |
| 2017 |
356.9 |
0.823 |
| 2018 |
356.1 |
0.824 |
| 2019 |
355.3 |
0.824 |
| 2020 |
354.5 |
0.825 |
| 2021 |
353.7 |
0.826 |
| 2022 |
352.9 |
0.826 |
| 2023 |
352.1 |
0.827 |
| 2024 |
351.3 |
0.828 |
| 2025 |
350.5 |
0.829 |
| 2026 |
349.7 |
0.830 |
| 2027 |
348.9 |
0.830 |
| 2028 |
348.1 |
0.831 |
| 2029 |
347.3 |
0.832 |
| 2030 |
346.6 |
0.833 |
|
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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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