20306+1349 HDS 2932 (HD 195397)
20h 30m 33.47s +13° 49' 02.4" P.A. 319.00 sep 0.2 mag 8.61,9.23 Sp F8 dist. 91.24 pc (297.62 l.y.)
Coord 2000 |
20306+1349 |
|
Discov num |
HDS2932 |
|
Comp |
|
|
Coord arcsec 2000 |
20 30 33.47 +13 49 02.4 |
|
Date first |
1991 |
|
Date last |
2019 |
|
Obs |
11 |
|
Pa first |
325 |
|
Pa last |
319.3 |
|
P.A. Now (θ) |
319.3° |
|
Sep first |
0.1 |
|
Sep last |
0.157 |
|
Sep. Now (ρ) |
0.157" |
|
Mag pri |
8.61 |
|
Mag sec |
9.23 |
|
delta mag (ΔM) |
0.62 |
|
Spectral class |
F8 (yellow-white) |
|
Pri motion ra |
+011 |
|
Sec motion ra |
|
|
Pri motion dec |
-014 |
|
Sec motion dec |
|
|
Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 195397 |
|
Constellation |
Delphinus |
|
SAO |
106180 |
|
HIP |
101181 |
|
Tycho2 |
1099-01401-1 |
|
Gaia DR2 |
1804333357532613632 |
|
HD |
195397 |
|
BD |
BD+13 4415 |
|
Distance |
91.24 |
|
Distance ly |
297.62 |
|
ORBITAL ELEMENTS SOLUTION #1
Period (P) | 95y | |
Periastron (T) | 1991.3y | |
Semi-major axis (a) | 0.254a | |
Eccentricity (e) | 0.392 | |
Inclination (i) | 82° | |
Longitude of periastron (ω) | 337.3° | |
Node (Ω) | 152.2° | |
Notes | | |
Reference | Tok2019h | |
Equinox | 2000 | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
161.0 |
0.129 |
2001 |
163.0 |
0.118 |
2002 |
165.5 |
0.106 |
2003 |
168.7 |
0.094 |
2004 |
172.8 |
0.081 |
2005 |
178.4 |
0.068 |
2006 |
186.6 |
0.056 |
2007 |
198.9 |
0.045 |
2008 |
217.5 |
0.038 |
2009 |
241.8 |
0.035 |
2010 |
265.1 |
0.039 |
2011 |
282.0 |
0.048 |
2012 |
293.1 |
0.059 |
2013 |
300.5 |
0.072 |
2014 |
305.6 |
0.085 |
2015 |
309.4 |
0.099 |
2016 |
312.2 |
0.112 |
2017 |
314.4 |
0.125 |
2018 |
316.2 |
0.139 |
2019 |
317.7 |
0.151 |
2020 |
319.0 |
0.164 |
2021 |
320.1 |
0.177 |
2022 |
321.0 |
0.189 |
2023 |
321.8 |
0.200 |
2024 |
322.6 |
0.211 |
2025 |
323.2 |
0.222 |
2026 |
323.8 |
0.233 |
2027 |
324.4 |
0.243 |
2028 |
324.9 |
0.253 |
2029 |
325.4 |
0.262 |
2030 |
325.8 |
0.270 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
ORBITAL ELEMENTS SOLUTION #2
Period (P) | 31.65y | ± 1.3 |
Periastron (T) | 2006.25y | ± 0.05 |
Semi-major axis (a) | 0.121a | ± 0.005 |
Eccentricity (e) | 0.859 | ± 0.003 |
Inclination (i) | 63.7° | ± 1.5 |
Longitude of periastron (ω) | 305.6° | ± 1 |
Node (Ω) | 175.9° | ± 1 |
Notes | | |
Reference | Doc2021e | |
Equinox | | |
Last observation | 2016 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
338.9 |
0.143 |
2001 |
340.8 |
0.134 |
2002 |
343.1 |
0.122 |
2003 |
346.0 |
0.108 |
2004 |
349.9 |
0.088 |
2005 |
356.9 |
0.060 |
2006 |
39.4 |
0.013 |
2007 |
205.5 |
0.030 |
2008 |
240.7 |
0.036 |
2009 |
263.8 |
0.045 |
2010 |
278.7 |
0.056 |
2011 |
288.6 |
0.067 |
2012 |
295.8 |
0.079 |
2013 |
301.1 |
0.089 |
2014 |
305.4 |
0.099 |
2015 |
308.9 |
0.109 |
2016 |
311.9 |
0.117 |
2017 |
314.4 |
0.125 |
2018 |
316.7 |
0.132 |
2019 |
318.8 |
0.139 |
2020 |
320.6 |
0.145 |
2021 |
322.4 |
0.150 |
2022 |
324.0 |
0.154 |
2023 |
325.6 |
0.157 |
2024 |
327.1 |
0.159 |
2025 |
328.6 |
0.161 |
2026 |
330.0 |
0.162 |
2027 |
331.5 |
0.161 |
2028 |
332.9 |
0.160 |
2029 |
334.4 |
0.157 |
2030 |
336.0 |
0.153 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|