18483-6856 JAO 8
18h 48m 21.10s -68° 55' 32.0" P.A. 266.00 sep 0.8 mag 23.60,20.90 Sp M5.0V+WD
Coord 2000 |
18483-6856 |
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Discov num |
JAO 8 |
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Comp |
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Coord arcsec 2000 |
18 48 21.10 -68 55 32.0 |
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Date first |
2011 |
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Date last |
2021 |
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Obs |
3 |
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Pa first |
278 |
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Pa last |
265.9 |
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P.A. Now (θ) |
265.9° |
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Sep first |
0.3 |
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Sep last |
0.761 |
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Sep. Now (ρ) |
0.761" |
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Mag pri |
23.60 |
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Mag sec |
20.90 |
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delta mag (ΔM) |
2.7 |
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Spectral class |
M5.0V+WD (red/Wolf-Rayet) |
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Pri motion ra |
-034 |
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Sec motion ra |
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Pri motion dec |
-123 |
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Sec motion dec |
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Notes |
N
O
P
(See Notes, Orbital solution, 100-year proper motion) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
ORBITAL ELEMENTS
Period (P) | 15.17y | ± 3.25 |
Periastron (T) | 2004.58y | ± 0.02 |
Semi-major axis (a) | 0.2082a | ± 0.0255 |
Eccentricity (e) | 0.84 | ± 0.03 |
Inclination (i) | 90.32° | ± 0.37 |
Longitude of periastron (ω) | 280.74° | ± 4.85 |
Node (Ω) | 248.08° | ± 2.25 |
Notes | n | |
Reference | Jao2014b | |
Equinox | | |
Last observation | 2011 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
68.8 |
0.134 |
2001 |
68.7 |
0.146 |
2002 |
68.5 |
0.150 |
2003 |
68.4 |
0.140 |
2004 |
68.2 |
0.095 |
2005 |
247.9 |
0.071 |
2006 |
247.5 |
0.083 |
2007 |
246.9 |
0.066 |
2008 |
245.8 |
0.041 |
2009 |
240.4 |
0.014 |
2010 |
76.4 |
0.014 |
2011 |
71.0 |
0.041 |
2012 |
69.9 |
0.067 |
2013 |
69.4 |
0.092 |
2014 |
69.1 |
0.113 |
2015 |
68.9 |
0.131 |
2016 |
68.7 |
0.144 |
2017 |
68.6 |
0.150 |
2018 |
68.4 |
0.143 |
2019 |
68.2 |
0.108 |
2020 |
248.1 |
0.056 |
2021 |
247.5 |
0.084 |
2022 |
247.0 |
0.069 |
2023 |
246.0 |
0.045 |
2024 |
242.4 |
0.019 |
2025 |
80.5 |
0.009 |
2026 |
71.3 |
0.037 |
2027 |
70.0 |
0.063 |
2028 |
69.4 |
0.088 |
2029 |
69.1 |
0.110 |
2030 |
68.9 |
0.128 |
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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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