17166-0027 A 2984 (41 Oph)
17h 16m 36.69s -00° 26' 43.1" P.A. 27.00 sep 0.7 mag 4.92,7.51 Sp K1IV dist. 63.09 pc (205.8 l.y.)
| Coord 2000 |
17166-0027 |
|
Discov num |
A 2984 |
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Comp |
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Coord arcsec 2000 |
17 16 36.69 -00 26 43.1 |
|
| Date first |
1915 |
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Date last |
2021 |
|
Obs |
94 |
|
| Pa first |
298 |
|
Pa last |
26.7 |
|
P.A. Now (θ) |
27.7° |
|
| Sep first |
0.5 |
|
Sep last |
0.677 |
|
Sep. Now (ρ) |
0.571" |
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| Mag pri |
4.92 |
|
Mag sec |
7.51 |
|
delta mag (ΔM) |
2.59 |
|
Spectral class |
K1IV (yellow-orange) |
|
| Pri motion ra |
-031 |
|
Sec motion ra |
-031 |
|
| Pri motion dec |
-073 |
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Sec motion dec |
-073 |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
41 Oph |
|
Constellation |
Ophiuchus |
|
SAO |
141586 |
|
HIP |
84514 |
|
| Tycho2 |
5066-01267-1 |
|
HD |
156266 |
|
HR |
6415 |
|
GC |
23320 |
|
| ADS |
10429 |
|
BD |
BD-00 3255 |
|
Flamsteed |
41 Ophiuchi |
|
Flamsteed name |
41 Oph |
|
| Distance |
63.09 |
|
Distance ly |
205.8 |
|
ORBITAL ELEMENTS
| Period (P) | 140.76y | ± 0.23 |
Periastron (T) | 1890.53y | ± 0.36 |
Semi-major axis (a) | 0.959a | ± 0.008 |
| Eccentricity (e) | 0.866 | ± 0.003 |
Inclination (i) | 65.1° | ± 0 |
Longitude of periastron (ω) | 287.5° | ± 0 |
| Node (Ω) | 220.5° | ± 0 |
Notes | n | |
Reference | Tok2015c | |
| Equinox | 2000 | |
Last observation | 2014 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
8.9 |
0.928 |
| 2001 |
9.5 |
0.922 |
| 2002 |
10.1 |
0.916 |
| 2003 |
10.6 |
0.908 |
| 2004 |
11.3 |
0.901 |
| 2005 |
11.9 |
0.892 |
| 2006 |
12.5 |
0.883 |
| 2007 |
13.1 |
0.874 |
| 2008 |
13.8 |
0.864 |
| 2009 |
14.5 |
0.852 |
| 2010 |
15.2 |
0.841 |
| 2011 |
15.9 |
0.828 |
| 2012 |
16.6 |
0.814 |
| 2013 |
17.4 |
0.799 |
| 2014 |
18.2 |
0.784 |
| 2015 |
19.0 |
0.767 |
| 2016 |
19.8 |
0.749 |
| 2017 |
20.7 |
0.729 |
| 2018 |
21.7 |
0.708 |
| 2019 |
22.7 |
0.685 |
| 2020 |
23.8 |
0.660 |
| 2021 |
25.0 |
0.633 |
| 2022 |
26.3 |
0.603 |
| 2023 |
27.7 |
0.571 |
| 2024 |
29.4 |
0.534 |
| 2025 |
31.2 |
0.494 |
| 2026 |
33.5 |
0.448 |
| 2027 |
36.3 |
0.394 |
| 2028 |
40.0 |
0.331 |
| 2029 |
45.9 |
0.254 |
| 2030 |
58.1 |
0.156 |
|
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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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