22288-0001 STF 2909 AB (Zet1 Aqr)
22h 28m 49.81s -00° 01' 12.2" P.A. 157.00 sep 2.4 mag 4.34,4.49 Sp F3IV-V dist. 28.17 pc (91.89 l.y.)
Coord 2000 |
22288-0001 |
|
Discov num |
STF2909 |
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Comp |
AB |
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Coord arcsec 2000 |
22 28 49.81 -00 01 12.2 |
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Date first |
1777 |
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Date last |
2021 |
|
Obs |
1199 |
|
Pa first |
18 |
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Pa last |
157.3 |
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P.A. Now (θ) |
154.4° |
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Sep first |
3.0 |
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Sep last |
2.387 |
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Sep. Now (ρ) |
2.407" |
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Mag pri |
4.34 |
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Mag sec |
4.49 |
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delta mag (ΔM) |
0.15 |
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Spectral class |
F3IV-V (yellow-white) |
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Pri motion ra |
+195 |
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Sec motion ra |
+176 |
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Pri motion dec |
+034 |
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Sec motion dec |
+013 |
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Notes |
N
O
(See Notes, Orbital solution) |
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rPM=0.143 (< 0.3, Physical double)
This double is physical.
22288-0001 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
146107 |
22 28 50 -00 01 12 |
EBE 1 Aa,Ab |
2021 |
16 |
218 |
0.7 |
4.34 |
11.30 |
6.96 |
Y |
|
Show |
Zet1 Aqr |
146107 |
22 28 50 -00 01 12 |
STF 2909 AB |
2021 |
1199 |
157 |
2.4 |
4.34 |
4.49 |
0.15 |
Y |
<=== |
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
Zet1 Aqr |
|
Constellation |
Aquarius |
|
SAO |
146107 |
|
HIP |
110960 |
|
Tycho2 |
5226-01605-1 |
|
HD |
213052 |
|
HR |
8558 |
|
GC |
31398 |
|
ADS |
15971 |
|
BD |
BD-00 4365 |
|
Bayer |
Zeta 1 Aquarii |
|
Bayer name |
Zet1 Aqr |
|
Flamsteed |
55 Aquarii |
|
Flamsteed name |
55 Aqr |
|
Distance |
28.17 |
|
Distance ly |
91.89 |
|
Bayer greek |
ζ1 Aqr |
|
ORBITAL ELEMENTS
Period (P) | 426.6517y | ± 122.5798 |
Periastron (T) | 1987.2881y | ± 13.5585 |
Semi-major axis (a) | 3.17843a | ± 0.34966 |
Eccentricity (e) | 0.3001 | ± 0.1203 |
Inclination (i) | 141.983° | ± 5.944 |
Longitude of periastron (ω) | 284.866° | ± 30.22 |
Node (Ω) | 137.98° | ± 7.616 |
Notes | n | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
185.8 |
1.954 |
2001 |
184.1 |
1.972 |
2002 |
182.5 |
1.990 |
2003 |
180.9 |
2.009 |
2004 |
179.3 |
2.028 |
2005 |
177.8 |
2.047 |
2006 |
176.2 |
2.067 |
2007 |
174.8 |
2.086 |
2008 |
173.3 |
2.106 |
2009 |
171.9 |
2.126 |
2010 |
170.5 |
2.147 |
2011 |
169.1 |
2.167 |
2012 |
167.7 |
2.187 |
2013 |
166.4 |
2.208 |
2014 |
165.1 |
2.228 |
2015 |
163.8 |
2.248 |
2016 |
162.6 |
2.269 |
2017 |
161.3 |
2.289 |
2018 |
160.1 |
2.309 |
2019 |
158.9 |
2.329 |
2020 |
157.8 |
2.348 |
2021 |
156.6 |
2.368 |
2022 |
155.5 |
2.387 |
2023 |
154.4 |
2.407 |
2024 |
153.3 |
2.426 |
2025 |
152.2 |
2.444 |
2026 |
151.1 |
2.463 |
2027 |
150.1 |
2.481 |
2028 |
149.0 |
2.499 |
2029 |
148.0 |
2.516 |
2030 |
147.0 |
2.534 |
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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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