08044+1217 BU 581 AB (HD 66509)
08h 04m 23.10s +12° 17' 23.8" P.A. 242.00 sep 0.5 mag 8.46,8.83 Sp K0V dist. 33.2 pc (108.3 l.y.)
| Coord 2000 |
08044+1217 |
|
Discov num |
BU 581 |
|
Comp |
AB |
|
Coord arcsec 2000 |
08 04 23.10 +12 17 23.8 |
|
| Date first |
1878 |
|
Date last |
2021 |
|
Obs |
226 |
|
| Pa first |
177 |
|
Pa last |
241.5 |
|
P.A. Now (θ) |
248.7° |
|
| Sep first |
0.4 |
|
Sep last |
0.457 |
|
Sep. Now (ρ) |
0.477" |
|
| Mag pri |
8.46 |
|
Mag sec |
8.83 |
|
delta mag (ΔM) |
0.37 |
|
Spectral class |
K0V (yellow-orange) |
|
| Pri motion ra |
+101 |
|
Sec motion ra |
+101 |
|
| Pri motion dec |
-138 |
|
Sec motion dec |
-138 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
08044+1217 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 66509 |
97530 |
08 04 23 +12 17 24 |
BU 581 AB |
2021 |
226 |
242 |
0.5 |
8.46 |
8.83 |
0.37 |
Y |
<=== |
| Show |
|
97530 |
08 04 23 +12 17 24 |
BU 581 AB,C |
2017 |
87 |
222 |
5.5 |
8.46 |
11.78 |
3.32 |
|
|
| Show |
|
97530 |
08 04 23 +12 17 24 |
BU 581 AB,D |
2015 |
8 |
169 |
213.0 |
8.46 |
11.09 |
2.63 |
|
|
| Show |
|
97530 |
08 04 23 +12 17 24 |
SLE 322 AB,E |
2015 |
5 |
205 |
76.8 |
8.46 |
13.44 |
4.98 |
|
|
| Show |
|
97530 |
08 04 23 +12 17 24 |
SLE 322 AB,F |
2015 |
4 |
140 |
268.2 |
8.46 |
12.08 |
3.62 |
|
|
Sextuple system
7 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 66509 |
|
Constellation |
Cancer |
|
SAO |
97530 |
|
HIP |
39495 |
|
| Tycho2 |
0789-00762-1 |
|
Gaia DR2 |
653032704866192768 |
|
HD |
66509 |
|
GC |
10945 |
|
| ADS |
6554 |
|
BD |
BD+12 1759 |
|
Distance |
33.2 |
|
Distance ly |
108.3 |
|
ORBITAL ELEMENTS
| Period (P) | 44.69y | |
Periastron (T) | 1999.51y | |
Semi-major axis (a) | 0.475a | |
| Eccentricity (e) | 0.429 | |
Inclination (i) | 54.9° | |
Longitude of periastron (ω) | 295.7° | |
| Node (Ω) | 113.8° | |
Notes | n | |
Reference | Hrt2000b | |
| Equinox | | |
Last observation | 1997 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
76.0 |
0.206 |
| 2001 |
94.0 |
0.256 |
| 2002 |
106.2 |
0.300 |
| 2003 |
115.6 |
0.332 |
| 2004 |
123.6 |
0.353 |
| 2005 |
130.9 |
0.364 |
| 2006 |
137.9 |
0.368 |
| 2007 |
144.9 |
0.368 |
| 2008 |
151.9 |
0.365 |
| 2009 |
159.1 |
0.360 |
| 2010 |
166.4 |
0.356 |
| 2011 |
173.9 |
0.353 |
| 2012 |
181.5 |
0.352 |
| 2013 |
189.1 |
0.353 |
| 2014 |
196.7 |
0.357 |
| 2015 |
203.9 |
0.363 |
| 2016 |
210.9 |
0.373 |
| 2017 |
217.5 |
0.384 |
| 2018 |
223.7 |
0.398 |
| 2019 |
229.5 |
0.412 |
| 2020 |
234.8 |
0.428 |
| 2021 |
239.8 |
0.445 |
| 2022 |
244.4 |
0.461 |
| 2023 |
248.7 |
0.477 |
| 2024 |
252.7 |
0.492 |
| 2025 |
256.5 |
0.507 |
| 2026 |
260.1 |
0.519 |
| 2027 |
263.5 |
0.530 |
| 2028 |
266.8 |
0.539 |
| 2029 |
270.0 |
0.545 |
| 2030 |
273.2 |
0.548 |
|
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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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