04177-6315 RMK 3 (The Ret)
04h 17m 40.27s -63° 15' 19.7" P.A. 2.00 sep 4.1 mag 6.04,7.67 Sp B9III-IV dist. 141.24 pc (460.72 l.y.)
Coord 2000 |
04177-6315 |
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Discov num |
RMK 3 |
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Comp |
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Coord arcsec 2000 |
04 17 40.27 -63 15 19.7 |
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Date first |
1835 |
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Date last |
2015 |
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Obs |
34 |
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Pa first |
6 |
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Pa last |
2.3 |
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P.A. Now (θ) |
2.3° |
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Sep first |
6.4 |
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Sep last |
4.084 |
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Sep. Now (ρ) |
4.084" |
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Mag pri |
6.04 |
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Mag sec |
7.67 |
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delta mag (ΔM) |
1.63 |
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Spectral class |
B9III-IV (blue-white) |
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Pri motion ra |
+005 |
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Sec motion ra |
+005 |
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Pri motion dec |
+008 |
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Sec motion dec |
+028 |
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Notes |
N
O
(See Notes, Orbital solution) |
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rPM=0.703
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
The Ret |
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Var name |
NSV1556 Ret |
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Constellation |
Reticulum |
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SAO |
248986 |
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HIP |
20020 |
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Tycho2 |
8872-01982-1 |
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Gaia DR2 |
4676067719930656640 |
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HD |
27657 |
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HR |
1372 |
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GC |
5233 |
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CD |
CD-63 143 |
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CP |
CP-63 316 |
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Bayer |
Theta Reticuli |
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Bayer name |
The Ret |
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Distance |
141.24 |
|
Distance ly |
460.72 |
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Bayer greek |
θ Ret |
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ORBITAL ELEMENTS
Period (P) | 26000y | |
Periastron (T) | 4900y | ± 900 |
Semi-major axis (a) | 14a | ± 3 |
Eccentricity (e) | 0.8 | ± 0.3 |
Inclination (i) | 105° | ± 2 |
Longitude of periastron (ω) | 210° | ± 40 |
Node (Ω) | 55° | ± 13 |
Notes | | |
Reference | LRR2018b | |
Equinox | 2000 | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
20.4 |
5.633 |
2001 |
20.4 |
5.630 |
2002 |
20.4 |
5.627 |
2003 |
20.4 |
5.624 |
2004 |
20.4 |
5.622 |
2005 |
20.4 |
5.619 |
2006 |
20.3 |
5.616 |
2007 |
20.3 |
5.613 |
2008 |
20.3 |
5.610 |
2009 |
20.3 |
5.608 |
2010 |
20.3 |
5.605 |
2011 |
20.3 |
5.602 |
2012 |
20.3 |
5.599 |
2013 |
20.2 |
5.597 |
2014 |
20.2 |
5.594 |
2015 |
20.2 |
5.591 |
2016 |
20.2 |
5.588 |
2017 |
20.2 |
5.585 |
2018 |
20.2 |
5.583 |
2019 |
20.2 |
5.580 |
2020 |
20.2 |
5.577 |
2021 |
20.1 |
5.574 |
2022 |
20.1 |
5.572 |
2023 |
20.1 |
5.569 |
2024 |
20.1 |
5.566 |
2025 |
20.1 |
5.563 |
2026 |
20.1 |
5.561 |
2027 |
20.1 |
5.558 |
2028 |
20.0 |
5.555 |
2029 |
20.0 |
5.552 |
2030 |
20.0 |
5.549 |
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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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