16446+7145 MLR 182 Aa,Ab
16h 44m 36.02s +71° 45' 25.0" P.A. 94.00 sep 0.3 mag 9.15,10.21 Sp G5 dist. 62.38 pc (203.48 l.y.)
| Coord 2000 |
16446+7145 |
|
Discov num |
MLR 182 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
16 44 36.02 +71 45 25.0 |
|
| Date first |
1971 |
|
Date last |
2012 |
|
Obs |
24 |
|
| Pa first |
91 |
|
Pa last |
94 |
|
P.A. Now (θ) |
94° |
|
| Sep first |
0.2 |
|
Sep last |
0.303 |
|
Sep. Now (ρ) |
0.303" |
|
| Mag pri |
9.15 |
|
Mag sec |
10.21 |
|
delta mag (ΔM) |
1.06 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
-109 |
|
Sec motion ra |
|
|
| Pri motion dec |
+118 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
16446+7145 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
8611 |
16 44 36 +71 45 25 |
MLR 182 Aa,Ab |
2012 |
24 |
94 |
0.3 |
9.15 |
10.21 |
1.06 |
Y |
<=== |
| Show |
|
8611 |
16 44 36 +71 45 25 |
UC 3219 AB |
2015 |
7 |
113 |
27.7 |
8.90 |
13.40 |
4.50 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Draco |
|
SAO |
8611 |
|
HIP |
81961 |
|
Tycho2 |
4423-01079-1 |
|
| Gaia DR2 |
1653447101974540160 |
|
HD |
152027 |
|
BD |
BD+72 751 |
|
Distance |
62.38 |
|
| Distance ly |
203.48 |
|
ORBITAL ELEMENTS
| Period (P) | 39.72y | ± 0.78 |
Periastron (T) | 1995.56y | ± 0.33 |
Semi-major axis (a) | 0.233a | ± 0.004 |
| Eccentricity (e) | 0.399 | ± 0.017 |
Inclination (i) | 124.7° | ± 1.5 |
Longitude of periastron (ω) | 45.2° | ± 2.5 |
| Node (Ω) | 293.4° | ± 1.3 |
Notes | n | |
Reference | Tok2020i | |
| Equinox | | |
Last observation | 2008 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
149.5 |
0.142 |
| 2001 |
139.0 |
0.172 |
| 2002 |
131.5 |
0.199 |
| 2003 |
125.7 |
0.223 |
| 2004 |
121.0 |
0.243 |
| 2005 |
117.0 |
0.260 |
| 2006 |
113.3 |
0.273 |
| 2007 |
110.0 |
0.282 |
| 2008 |
106.9 |
0.289 |
| 2009 |
103.8 |
0.293 |
| 2010 |
100.9 |
0.294 |
| 2011 |
97.9 |
0.293 |
| 2012 |
94.9 |
0.290 |
| 2013 |
91.8 |
0.285 |
| 2014 |
88.5 |
0.278 |
| 2015 |
85.1 |
0.269 |
| 2016 |
81.4 |
0.259 |
| 2017 |
77.4 |
0.247 |
| 2018 |
73.0 |
0.235 |
| 2019 |
68.1 |
0.222 |
| 2020 |
62.5 |
0.209 |
| 2021 |
56.2 |
0.195 |
| 2022 |
49.0 |
0.183 |
| 2023 |
40.8 |
0.171 |
| 2024 |
31.5 |
0.162 |
| 2025 |
21.2 |
0.154 |
| 2026 |
10.0 |
0.150 |
| 2027 |
358.5 |
0.149 |
| 2028 |
347.0 |
0.151 |
| 2029 |
336.0 |
0.154 |
| 2030 |
325.5 |
0.159 |
|
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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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