16366+6948 BU 953 AB
16h 36m 39.05s +69° 47' 34.7" P.A. 90.00 sep 0.5 mag 8.56,9.27 Sp F2V dist. 106.95 pc (348.87 l.y.)
| Coord 2000 |
16366+6948 |
|
Discov num |
BU 953 |
|
Comp |
AB |
|
Coord arcsec 2000 |
16 36 39.05 +69 47 34.7 |
|
| Date first |
1879 |
|
Date last |
2012 |
|
Obs |
67 |
|
| Pa first |
329 |
|
Pa last |
90.3 |
|
P.A. Now (θ) |
46.1° |
|
| Sep first |
0.3 |
|
Sep last |
0.462 |
|
Sep. Now (ρ) |
0.235" |
|
| Mag pri |
8.56 |
|
Mag sec |
9.27 |
|
delta mag (ΔM) |
0.71 |
|
Spectral class |
F2V (yellow-white) |
|
| Pri motion ra |
-037 |
|
Sec motion ra |
|
|
| Pri motion dec |
+042 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
16366+6948 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
17167 |
16 36 39 +69 47 35 |
BU 953 AB |
2012 |
67 |
90 |
0.5 |
8.56 |
9.27 |
0.71 |
Y |
<=== |
| Show |
HD 150631 |
17167 |
16 36 39 +69 47 35 |
BU 953 AB,C |
2019 |
13 |
148 |
75.2 |
8.04 |
10.88 |
2.84 |
|
|
| Show |
|
17167 |
16 36 39 +69 47 35 |
BU 953 AB,D |
2019 |
19 |
45 |
146.7 |
8.04 |
8.03 |
0.01 |
|
|
| Show |
|
17167 |
16 36 39 +69 47 35 |
ABH 86 AB,E |
2015 |
10 |
340 |
77.5 |
8.04 |
11.65 |
3.61 |
|
|
| Show |
|
17169 |
16 36 59 +69 49 18 |
BAZ 7 Da,Db |
1992 |
10 |
283 |
0.4 |
8.14 |
10.85 |
2.71 |
|
|
Sextuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Draco |
|
SAO |
17167 |
|
HIP |
81332 |
|
Tycho2 |
4420-00447-1 |
|
| Gaia DR2 |
1649710892743774464 |
|
HD |
150631 |
|
ADS |
10140 |
|
BD |
BD+70 887 |
|
| Distance |
106.95 |
|
Distance ly |
348.87 |
|
ORBITAL ELEMENTS
| Period (P) | 220.78y | ± 72.76 |
Periastron (T) | 1899.73y | ± 7.11 |
Semi-major axis (a) | 0.415a | ± 0.113 |
| Eccentricity (e) | 0.444 | ± 0.064 |
Inclination (i) | 113.1° | ± 5.9 |
Longitude of periastron (ω) | 264.1° | ± 30.2 |
| Node (Ω) | 144.2° | ± 5.4 |
Notes | n | |
Reference | Hrt2008 | |
| Equinox | 2000 | |
Last observation | 2004 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
84.7 |
0.264 |
| 2001 |
83.3 |
0.262 |
| 2002 |
81.8 |
0.259 |
| 2003 |
80.3 |
0.256 |
| 2004 |
78.8 |
0.254 |
| 2005 |
77.3 |
0.252 |
| 2006 |
75.7 |
0.249 |
| 2007 |
74.1 |
0.247 |
| 2008 |
72.5 |
0.245 |
| 2009 |
70.8 |
0.244 |
| 2010 |
69.2 |
0.242 |
| 2011 |
67.5 |
0.241 |
| 2012 |
65.7 |
0.239 |
| 2013 |
64.0 |
0.238 |
| 2014 |
62.3 |
0.237 |
| 2015 |
60.5 |
0.236 |
| 2016 |
58.7 |
0.235 |
| 2017 |
56.9 |
0.235 |
| 2018 |
55.1 |
0.234 |
| 2019 |
53.3 |
0.234 |
| 2020 |
51.5 |
0.234 |
| 2021 |
49.7 |
0.234 |
| 2022 |
47.9 |
0.234 |
| 2023 |
46.1 |
0.235 |
| 2024 |
44.3 |
0.235 |
| 2025 |
42.6 |
0.236 |
| 2026 |
40.8 |
0.237 |
| 2027 |
39.0 |
0.238 |
| 2028 |
37.3 |
0.239 |
| 2029 |
35.6 |
0.241 |
| 2030 |
33.9 |
0.242 |
|
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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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