08090+3249 BDT 2 Aa,Ab
08h 08m 56.39s +32° 49' 11.4" P.A. 70.00 sep 0.2 mag 6.70,8.70 Sp M0.5 dist. 21.27 pc (69.38 l.y.)
| Coord 2000 |
08090+3249 |
|
Discov num |
BDT 2 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
08 08 56.39 +32 49 11.4 |
|
| Date first |
2001 |
|
Date last |
2019 |
|
Obs |
9 |
|
| Pa first |
51 |
|
Pa last |
69.6 |
|
P.A. Now (θ) |
110.4° |
|
| Sep first |
0.2 |
|
Sep last |
0.207 |
|
Sep. Now (ρ) |
0.219" |
|
| Mag pri |
6.70 |
|
Mag sec |
8.70 |
|
delta mag (ΔM) |
2 |
|
Spectral class |
M0.5 (red) |
|
| Pri motion ra |
-044 |
|
Sec motion ra |
|
|
| Pri motion dec |
-191 |
|
Sec motion dec |
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| Notes |
N
O
K
(See Notes, Orbital solution, K-band or other infrared magnitudes) |
|
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
08090+3249 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
08 08 56 +32 49 11 |
BDT 2 Aa,Ab |
2019 |
9 |
70 |
0.2 |
6.70 |
8.70 |
2.00 |
Y |
<=== |
| Show |
FP Cnc |
|
08 08 56 +32 49 11 |
DYR 1 AB |
2019 |
27 |
240 |
13.9 |
10.13 |
10.80 |
0.67 |
|
|
| Show |
|
|
08 08 56 +32 49 11 |
DYR 1 AC |
1991 |
3 |
292 |
11.2 |
10.13 |
13.40 |
3.27 |
|
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Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
FP Cnc |
|
Constellation |
Cancer |
|
HIP |
39896 |
|
Tycho2 |
2473-01174-1 |
|
| Gaia DR2 |
902175202130167936 |
|
GL |
GJ 1108A |
|
BD |
BD+33 1646 |
|
Distance |
21.27 |
|
| Distance ly |
69.38 |
|
ORBITAL ELEMENTS
| Period (P) | 8.24y | ± 0.03 |
Periastron (T) | 54703.85d (2008.65y) | ± 10.04 |
Semi-major axis (a) | 166m | ± 1 |
| Eccentricity (e) | 0.63 | ± 0.01 |
Inclination (i) | 42.47° | ± 1.32 |
Longitude of periastron (ω) | 347.45° | ± 2.6 |
| Node (Ω) | 278.22° | ± 1.77 |
Notes | | |
Reference | Miz2018 | |
| Equinox | 2000 | |
Last observation | 2015 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
187.6 |
0.065 |
| 2001 |
359.0 |
0.079 |
| 2002 |
53.7 |
0.162 |
| 2003 |
72.2 |
0.226 |
| 2004 |
83.7 |
0.261 |
| 2005 |
93.4 |
0.267 |
| 2006 |
103.8 |
0.244 |
| 2007 |
118.4 |
0.187 |
| 2008 |
158.4 |
0.088 |
| 2009 |
327.6 |
0.068 |
| 2010 |
46.5 |
0.142 |
| 2011 |
68.7 |
0.213 |
| 2012 |
81.2 |
0.255 |
| 2013 |
91.1 |
0.268 |
| 2014 |
101.1 |
0.253 |
| 2015 |
114.1 |
0.204 |
| 2016 |
142.1 |
0.115 |
| 2017 |
288.6 |
0.063 |
| 2018 |
37.0 |
0.122 |
| 2019 |
64.8 |
0.199 |
| 2020 |
78.6 |
0.247 |
| 2021 |
88.8 |
0.268 |
| 2022 |
98.6 |
0.259 |
| 2023 |
110.4 |
0.219 |
| 2024 |
131.9 |
0.140 |
| 2025 |
243.2 |
0.058 |
| 2026 |
23.4 |
0.101 |
| 2027 |
60.3 |
0.182 |
| 2028 |
75.8 |
0.238 |
| 2029 |
86.5 |
0.265 |
| 2030 |
96.1 |
0.264 |
|
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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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