18447-2548 SEE 358 (HD 173099)
18h 44m 44.48s -25° 47' 51.4" P.A. 69.00 sep 1.2 mag 8.41,8.82 Sp F7/8V dist. 55.01 pc (179.44 l.y.)
| Coord 2000 |
18447-2548 |
|
Discov num |
SEE 358 |
|
Comp |
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Coord arcsec 2000 |
18 44 44.48 -25 47 51.4 |
|
| Date first |
1897 |
|
Date last |
2016 |
|
Obs |
41 |
|
| Pa first |
30 |
|
Pa last |
68.7 |
|
P.A. Now (θ) |
68.7° |
|
| Sep first |
1.9 |
|
Sep last |
1.233 |
|
Sep. Now (ρ) |
1.233" |
|
| Mag pri |
8.41 |
|
Mag sec |
8.82 |
|
delta mag (ΔM) |
0.41 |
|
Spectral class |
F7/8V (yellow-white) |
|
| Pri motion ra |
+011 |
|
Sec motion ra |
+011 |
|
| Pri motion dec |
-120 |
|
Sec motion dec |
-120 |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 173099 |
|
Constellation |
Sagittarius |
|
HIP |
91967 |
|
Tycho2 |
6863-00606-1 |
|
| Gaia DR2 |
4073370352444789376 |
|
HD |
173099 |
|
ADS |
11622 |
|
CD |
CD-2513391 |
|
| CP |
CP-25 6599 |
|
Distance |
55.01 |
|
Distance ly |
179.44 |
|
ORBITAL ELEMENTS
| Period (P) | 1155.4735y | ± 600.2708 |
Periastron (T) | 2065.1486y | ± 62.5543 |
Semi-major axis (a) | 3.44935a | ± 1.88456 |
| Eccentricity (e) | 0.86024 | ± 0.18937 |
Inclination (i) | 66.992° | ± 13.763 |
Longitude of periastron (ω) | 73.173° | ± 18.219 |
| Node (Ω) | 96.441° | ± 59.063 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
62.1 |
1.319 |
| 2001 |
62.5 |
1.314 |
| 2002 |
63.0 |
1.309 |
| 2003 |
63.4 |
1.304 |
| 2004 |
63.8 |
1.299 |
| 2005 |
64.3 |
1.294 |
| 2006 |
64.7 |
1.289 |
| 2007 |
65.2 |
1.284 |
| 2008 |
65.6 |
1.278 |
| 2009 |
66.1 |
1.273 |
| 2010 |
66.5 |
1.267 |
| 2011 |
67.0 |
1.262 |
| 2012 |
67.4 |
1.256 |
| 2013 |
67.9 |
1.250 |
| 2014 |
68.4 |
1.243 |
| 2015 |
68.9 |
1.237 |
| 2016 |
69.4 |
1.231 |
| 2017 |
69.8 |
1.224 |
| 2018 |
70.3 |
1.217 |
| 2019 |
70.8 |
1.210 |
| 2020 |
71.3 |
1.203 |
| 2021 |
71.9 |
1.196 |
| 2022 |
72.4 |
1.188 |
| 2023 |
72.9 |
1.180 |
| 2024 |
73.4 |
1.172 |
| 2025 |
74.0 |
1.164 |
| 2026 |
74.5 |
1.155 |
| 2027 |
75.1 |
1.146 |
| 2028 |
75.7 |
1.137 |
| 2029 |
76.2 |
1.128 |
| 2030 |
76.8 |
1.118 |
|
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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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