19398-2326 SEE 389 (53 Sgr)
19h 39m 49.46s -23° 25' 39.4" P.A. 330.00 sep 0.2 mag 6.80,7.51 Sp A0V dist. 98.72 pc (322.02 l.y.)
| Coord 2000 |
19398-2326 |
|
Discov num |
SEE 389 |
|
Comp |
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Coord arcsec 2000 |
19 39 49.46 -23 25 39.4 |
|
| Date first |
1897 |
|
Date last |
2021 |
|
Obs |
38 |
|
| Pa first |
332 |
|
Pa last |
330 |
|
P.A. Now (θ) |
327.8° |
|
| Sep first |
0.2 |
|
Sep last |
0.179 |
|
Sep. Now (ρ) |
0.201" |
|
| Mag pri |
6.80 |
|
Mag sec |
7.51 |
|
delta mag (ΔM) |
0.71 |
|
Spectral class |
A0V (white) |
|
| Pri motion ra |
+006 |
|
Sec motion ra |
|
|
| Pri motion dec |
-037 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
53 Sgr |
|
Constellation |
Sagittarius |
|
SAO |
188407 |
|
HIP |
96729 |
|
| Tycho2 |
6889-02260-1 |
|
Gaia DR2 |
6768670963020310656 |
|
HD |
185404 |
|
HR |
7470 |
|
| GC |
27189 |
|
ADS |
12741 |
|
CD |
CD-2315618 |
|
CP |
CP-23 7543 |
|
| Flamsteed |
53 Sagittarii |
|
Flamsteed name |
53 Sgr |
|
Distance |
98.72 |
|
Distance ly |
322.02 |
|
ORBITAL ELEMENTS
| Period (P) | 46.2y | ± 0.1 |
Periastron (T) | 1976.63y | ± 0.6 |
Semi-major axis (a) | 0.221a | ± 0.001 |
| Eccentricity (e) | 0.088 | ± 0.007 |
Inclination (i) | 93.5° | ± 0.2 |
Longitude of periastron (ω) | 0.4° | ± 4.7 |
| Node (Ω) | 327.9° | ± 0.3 |
Notes | n | |
Reference | Tok2015c | |
| Equinox | 2000 | |
Last observation | 2014 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
147.8 |
0.240 |
| 2001 |
147.4 |
0.237 |
| 2002 |
146.9 |
0.231 |
| 2003 |
146.5 |
0.222 |
| 2004 |
146.0 |
0.209 |
| 2005 |
145.4 |
0.193 |
| 2006 |
144.7 |
0.174 |
| 2007 |
143.9 |
0.153 |
| 2008 |
142.7 |
0.129 |
| 2009 |
141.0 |
0.103 |
| 2010 |
138.0 |
0.076 |
| 2011 |
131.6 |
0.047 |
| 2012 |
107.4 |
0.021 |
| 2013 |
10.6 |
0.020 |
| 2014 |
344.1 |
0.046 |
| 2015 |
337.4 |
0.074 |
| 2016 |
334.3 |
0.101 |
| 2017 |
332.5 |
0.126 |
| 2018 |
331.3 |
0.149 |
| 2019 |
330.3 |
0.168 |
| 2020 |
329.6 |
0.183 |
| 2021 |
328.9 |
0.194 |
| 2022 |
328.4 |
0.200 |
| 2023 |
327.8 |
0.201 |
| 2024 |
327.2 |
0.198 |
| 2025 |
326.6 |
0.190 |
| 2026 |
325.9 |
0.177 |
| 2027 |
325.1 |
0.160 |
| 2028 |
324.1 |
0.139 |
| 2029 |
322.6 |
0.116 |
| 2030 |
320.4 |
0.090 |
|
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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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