00084+2905 MKT 11 Aa,Ab
00h 08m 23.17s +29° 05' 27.0" P.A. 241.00 sep 0.0 mag 2.22,4.21 Sp B8IVp dist. 29.74 pc (97.01 l.y.)
| Coord 2000 |
00084+2905 |
|
Discov num |
MKT 11 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
00 08 23.17 +29 05 27.0 |
|
| Date first |
1988 |
|
Date last |
1989 |
|
Obs |
42 |
|
| Pa first |
257 |
|
Pa last |
241 |
|
P.A. Now (θ) |
241° |
|
| Sep first |
0.0 |
|
Sep last |
0.014 |
|
Sep. Now (ρ) |
0.014" |
|
| Mag pri |
2.22 |
|
Mag sec |
4.21 |
|
delta mag (ΔM) |
1.99 |
|
Spectral class |
B8IVp (blue-white) |
|
| Pri motion ra |
+136 |
|
Sec motion ra |
|
|
| Pri motion dec |
-163 |
|
Sec motion dec |
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|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
00084+2905 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
73765 |
00 08 23 +29 05 27 |
MKT 11 Aa,Ab |
1989 |
42 |
241 |
0.0 |
2.22 |
4.21 |
1.99 |
Y |
<=== |
| Show |
Alpheratz |
73765 |
00 08 23 +29 05 27 |
H 5 32 AB |
2020 |
49 |
286 |
93.1 |
2.22 |
11.11 |
8.89 |
|
|
| Show |
|
73765 |
00 08 23 +29 05 27 |
JNN 1 AC |
2009 |
2 |
5 |
6.7 |
2.29 |
19.60 |
17.31 |
|
|
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Alpheratz |
|
Constellation |
Andromeda |
|
SAO |
73765 |
|
HIP |
677 |
|
| Tycho2 |
1735-03180-1 |
|
HD |
358 |
|
HR |
15 |
|
GC |
127 |
|
| ADS |
94 |
|
BD |
BD+28 4 |
|
Bayer |
Alpha Andromedae |
|
Bayer name |
Alp And |
|
| Flamsteed |
21 Andromedae |
|
Flamsteed name |
21 And |
|
FK5 |
1 |
|
Distance |
29.74 |
|
| Distance ly |
97.01 |
|
Bayer greek |
α And |
|
| Other names |
Sirrah, Sirah, Del Peg, Delta Pegasi |
|
ORBITAL ELEMENTS
| Period (P) | 96.7015d | ± 0.0044 |
Periastron (T) | 47374.563d (1988.583y) | ± 0.095 |
Semi-major axis (a) | 24m | ± 0.13 |
| Eccentricity (e) | 0.535 | ± 0.0046 |
Inclination (i) | 105.6° | ± 0.23 |
Longitude of periastron (ω) | 257.4° | ± 0.31 |
| Node (Ω) | 284.4° | ± 0.21 |
Notes | n | |
Reference | Pbx2000b | |
| Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
283.2 |
0.020 |
| 2001-01-01 |
109.9 |
0.017 |
| 2002-01-01 |
156.9 |
0.011 |
| 2003-01-01 |
245.9 |
0.015 |
| 2004-01-01 |
273.3 |
0.024 |
| 2005-01-01 |
24.1 |
0.003 |
| 2006-01-01 |
127.9 |
0.016 |
| 2007-01-01 |
211.2 |
0.010 |
| 2008-01-01 |
263.1 |
0.021 |
| 2009-01-01 |
284.0 |
0.020 |
| 2010-01-01 |
111.0 |
0.018 |
| 2011-01-01 |
159.7 |
0.011 |
| 2012-01-01 |
247.3 |
0.015 |
| 2013-01-01 |
273.8 |
0.024 |
| 2014-01-01 |
53.6 |
0.004 |
| 2015-01-01 |
129.2 |
0.016 |
| 2016-01-01 |
214.3 |
0.010 |
| 2017-01-01 |
263.9 |
0.021 |
| 2018-01-01 |
284.9 |
0.019 |
| 2019-01-01 |
112.0 |
0.018 |
| 2020-01-01 |
162.5 |
0.011 |
| 2021-01-01 |
248.7 |
0.016 |
| 2022-01-01 |
274.4 |
0.024 |
| 2023-01-01 |
70.9 |
0.005 |
| 2024-01-01 |
130.6 |
0.015 |
| 2025-01-01 |
217.3 |
0.011 |
| 2026-01-01 |
264.6 |
0.021 |
| 2027-01-01 |
285.8 |
0.018 |
| 2028-01-01 |
113.0 |
0.018 |
| 2029-01-01 |
165.5 |
0.010 |
| 2030-01-01 |
250.0 |
0.016 |
|
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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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