20375+1436 BU 151 AB (Rotanev)
20h 37m 32.87s +14° 35' 42.7" P.A. 320.00 sep 0.3 mag 4.11,5.02 Sp F5IV+F2V dist. 30.93 pc (100.89 l.y.)
| Coord 2000 |
20375+1436 |
|
Discov num |
BU 151 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 37 32.87 +14 35 42.7 |
|
| Date first |
1873 |
|
Date last |
2023 |
|
Obs |
740 |
|
| Pa first |
355 |
|
Pa last |
320 |
|
P.A. Now (θ) |
332.4° |
|
| Sep first |
0.7 |
|
Sep last |
0.339 |
|
Sep. Now (ρ) |
0.432" |
|
| Mag pri |
4.11 |
|
Mag sec |
5.02 |
|
delta mag (ΔM) |
0.91 |
|
Spectral class |
F5IV+F2V (yellow-white/yellow-white) |
|
| Pri motion ra |
+118 |
|
Sec motion ra |
|
|
| Pri motion dec |
-048 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
20375+1436 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Rotanev |
106316 |
20 37 33 +14 35 43 |
BU 151 AB |
2023 |
740 |
320 |
0.3 |
4.11 |
5.02 |
0.91 |
Y |
<=== |
| Show |
|
|
20 37 33 +14 35 43 |
HJ 5545 AB,C |
2011 |
32 |
139 |
12.1 |
3.68 |
13.50 |
9.82 |
|
|
| Show |
Bet Del |
106316 |
20 37 33 +14 35 43 |
STF 2704 AB,D |
2014 |
60 |
317 |
47.8 |
3.68 |
11.40 |
7.72 |
|
|
| Show |
|
106316 |
20 37 33 +14 35 43 |
LBZ 1 AB,E |
2014 |
9 |
271 |
112.6 |
3.68 |
11.63 |
7.95 |
|
|
Quintuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Rotanev |
|
Constellation |
Delphinus |
|
SAO |
106316 |
|
HIP |
101769 |
|
| Tycho2 |
1100-01720-1 |
|
Gaia DR2 |
1810448909926616448 |
|
HD |
196524 |
|
HR |
7882 |
|
| GC |
28709 |
|
ADS |
14073 |
|
BD |
BD+14 4369 |
|
Bayer |
Beta Delphini |
|
| Bayer name |
Bet Del |
|
Flamsteed |
6 Delphini |
|
Flamsteed name |
6 Del |
|
Distance |
30.93 |
|
| Distance ly |
100.89 |
|
Bayer greek |
β Del |
|
| Meaning |
'Venator' in reverse |
|
ORBITAL ELEMENTS
| Period (P) | 9745.8d (26.68y) | ± 1.4 |
Periastron (T) | 37961.5m (1962.812y) | ± 4 |
Semi-major axis (a) | 0.43701a | ± 0.00016 |
| Eccentricity (e) | 0.35595 | ± 0.00069 |
Inclination (i) | 61.323° | ± 0.03 |
Longitude of periastron (ω) | 168.86° | ± 0.13 |
| Node (Ω) | 357.179° | ± 0.029 |
Notes | n | |
Reference | Mut2010e | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
341.1 |
0.512 |
| 2001 |
345.2 |
0.547 |
| 2002 |
348.9 |
0.571 |
| 2003 |
352.3 |
0.586 |
| 2004 |
355.7 |
0.589 |
| 2005 |
359.0 |
0.581 |
| 2006 |
2.6 |
0.561 |
| 2007 |
6.5 |
0.529 |
| 2008 |
10.9 |
0.486 |
| 2009 |
16.4 |
0.431 |
| 2010 |
23.7 |
0.366 |
| 2011 |
34.5 |
0.293 |
| 2012 |
52.3 |
0.222 |
| 2013 |
83.4 |
0.173 |
| 2014 |
122.6 |
0.181 |
| 2015 |
150.9 |
0.229 |
| 2016 |
169.1 |
0.273 |
| 2017 |
183.7 |
0.282 |
| 2018 |
199.4 |
0.257 |
| 2019 |
220.0 |
0.218 |
| 2020 |
248.2 |
0.193 |
| 2021 |
278.2 |
0.207 |
| 2022 |
300.7 |
0.253 |
| 2023 |
315.4 |
0.313 |
| 2024 |
325.2 |
0.375 |
| 2025 |
332.4 |
0.432 |
| 2026 |
337.9 |
0.482 |
| 2027 |
342.4 |
0.524 |
| 2028 |
346.4 |
0.556 |
| 2029 |
350.0 |
0.577 |
| 2030 |
353.4 |
0.588 |
| 2031 |
356.7 |
0.587 |
| 2032 |
0.1 |
0.576 |
| 2033 |
3.8 |
0.552 |
| 2034 |
7.8 |
0.517 |
| 2035 |
12.5 |
0.470 |
| 2036 |
18.5 |
0.412 |
| 2037 |
26.6 |
0.344 |
| 2038 |
39.1 |
0.270 |
| 2039 |
60.5 |
0.202 |
| 2040 |
96.0 |
0.169 |
| 2041 |
133.1 |
0.194 |
| 2042 |
157.4 |
0.246 |
| 2043 |
173.8 |
0.280 |
| 2044 |
188.4 |
0.277 |
| 2045 |
205.2 |
0.245 |
| 2046 |
228.2 |
0.207 |
| 2047 |
258.1 |
0.193 |
| 2048 |
286.3 |
0.219 |
| 2049 |
306.1 |
0.271 |
| 2050 |
318.9 |
0.332 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
