21415-7723 BLM 6 (Nu Oct)
21h 41m 28.65s -77° 23' 24.1" P.A. 331.00 sep 0.1 mag 3.73, Sp K1III dist. 21.2 pc (69.15 l.y.)
| Coord 2000 |
21415-7723 |
|
Discov num |
BLM 6 |
|
Comp |
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Coord arcsec 2000 |
21 41 28.65 -77 23 24.1 |
|
| Date first |
1976 |
|
Date last |
1976 |
|
Obs |
1 |
|
| Pa first |
331 |
|
Pa last |
331 |
|
P.A. Now (θ) |
331° |
|
| Sep first |
0.1 |
|
Sep last |
0.104 |
|
Sep. Now (ρ) |
0.104" |
|
| Mag pri |
3.73 |
|
Mag sec |
|
|
delta mag (ΔM) |
|
|
Spectral class |
K1III (yellow-orange) |
|
| Pri motion ra |
+074 |
|
Sec motion ra |
|
|
| Pri motion dec |
-107 |
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Sec motion dec |
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|
| Notes |
N
X
O
(See Notes, Dubious double, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
Nu Oct |
|
Constellation |
Octans |
|
SAO |
257948 |
|
HIP |
107089 |
|
| Tycho2 |
9478-01483-1 |
|
Gaia DR2 |
6356375508717699584 |
|
HD |
205478 |
|
HR |
8254 |
|
| GC |
30289 |
|
GL |
Gl 835.1 |
|
CP |
CP-77 1510 |
|
Bayer |
Nu Octantis |
|
| Bayer name |
Nu Oct |
|
FK5 |
810 |
|
Distance |
21.2 |
|
Distance ly |
69.15 |
|
| Bayer greek |
ν Oct |
|
ORBITAL ELEMENTS
| Period (P) | 2.84y | |
Periastron (T) | 1906.471y | |
Semi-major axis (a) | 0.052a | |
| Eccentricity (e) | 0.25 | |
Inclination (i) | 65° | |
Longitude of periastron (ω) | 37° | |
| Node (Ω) | 118° | |
Notes | n | |
Reference | Ald1939b | |
| Equinox | | |
Last observation | 1938 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
116.6 |
0.041 |
| 2001 |
291.5 |
0.056 |
| 2002 |
345.1 |
0.033 |
| 2003 |
131.8 |
0.035 |
| 2004 |
298.0 |
0.061 |
| 2005 |
11.9 |
0.026 |
| 2006 |
159.8 |
0.023 |
| 2007 |
303.9 |
0.062 |
| 2008 |
49.3 |
0.025 |
| 2009 |
221.4 |
0.019 |
| 2010 |
310.0 |
0.059 |
| 2011 |
79.9 |
0.031 |
| 2012 |
263.6 |
0.030 |
| 2013 |
317.1 |
0.053 |
| 2014 |
99.2 |
0.038 |
| 2015 |
280.3 |
0.044 |
| 2016 |
326.4 |
0.045 |
| 2017 |
113.3 |
0.041 |
| 2018 |
289.6 |
0.054 |
| 2019 |
340.4 |
0.036 |
| 2020 |
127.5 |
0.037 |
| 2021 |
296.5 |
0.060 |
| 2022 |
3.9 |
0.027 |
| 2023 |
150.3 |
0.026 |
| 2024 |
302.4 |
0.062 |
| 2025 |
39.8 |
0.024 |
| 2026 |
204.4 |
0.018 |
| 2027 |
308.4 |
0.060 |
| 2028 |
73.5 |
0.029 |
| 2029 |
256.7 |
0.027 |
| 2030 |
315.1 |
0.055 |
|
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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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