21008-0821 BU 678 AB (HD 199976)
21h 00m 49.02s -08° 20' 34.3" P.A. 260.00 sep 2.8 mag 8.20,11.26 Sp G0 dist. 34.38 pc (112.15 l.y.)
Coord 2000 |
21008-0821 |
|
Discov num |
BU 678 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 00 49.02 -08 20 34.3 |
|
Date first |
1877 |
|
Date last |
2016 |
|
Obs |
27 |
|
Pa first |
182 |
|
Pa last |
260.2 |
|
P.A. Now (θ) |
260.2° |
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Sep first |
2.2 |
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Sep last |
2.847 |
|
Sep. Now (ρ) |
2.847" |
|
Mag pri |
8.20 |
|
Mag sec |
11.26 |
|
delta mag (ΔM) |
3.06 |
|
Spectral class |
G0 (yellow) |
|
Pri motion ra |
+243 |
|
Sec motion ra |
+239 |
|
Pri motion dec |
+030 |
|
Sec motion dec |
+027 |
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Notes |
O
(Orbital solution) |
|
rPM=0.02 (< 0.3, Physical double)
This double is physical.
21008-0821 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 199976 |
145026 |
21 00 49 -08 20 34 |
BU 678 AB |
2016 |
27 |
260 |
2.8 |
8.20 |
11.26 |
3.06 |
Y |
<=== |
Show |
|
145026 |
21 00 49 -08 20 34 |
FOX 255 AC |
2000 |
3 |
251 |
71.0 |
8.20 |
13.50 |
5.30 |
|
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Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 199976 |
|
Constellation |
Aquarius |
|
SAO |
145026 |
|
HIP |
103699 |
|
Tycho2 |
5770-00692-1 |
|
Gaia DR2 |
6908757299969652480 |
|
HD |
199976 |
|
ADS |
14528 |
|
BD |
BD-08 5544 |
|
Distance |
34.38 |
|
Distance ly |
112.15 |
|
ORBITAL ELEMENTS
Period (P) | 837.9275y | ± 406.6674 |
Periastron (T) | 1850.9234y | ± 10.5379 |
Semi-major axis (a) | 9.37004a | ± 6.26094 |
Eccentricity (e) | 0.90786 | ± 0.08214 |
Inclination (i) | 77.618° | ± 8.232 |
Longitude of periastron (ω) | 285.592° | ± 10.83 |
Node (Ω) | 168.607° | ± 4.294 |
Notes | | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2014 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
253.0 |
2.711 |
2001 |
253.5 |
2.718 |
2002 |
253.9 |
2.726 |
2003 |
254.4 |
2.734 |
2004 |
254.8 |
2.742 |
2005 |
255.3 |
2.750 |
2006 |
255.7 |
2.758 |
2007 |
256.2 |
2.766 |
2008 |
256.6 |
2.774 |
2009 |
257.0 |
2.782 |
2010 |
257.5 |
2.791 |
2011 |
257.9 |
2.799 |
2012 |
258.3 |
2.808 |
2013 |
258.8 |
2.817 |
2014 |
259.2 |
2.826 |
2015 |
259.6 |
2.835 |
2016 |
260.0 |
2.844 |
2017 |
260.5 |
2.853 |
2018 |
260.9 |
2.862 |
2019 |
261.3 |
2.871 |
2020 |
261.7 |
2.881 |
2021 |
262.1 |
2.890 |
2022 |
262.5 |
2.900 |
2023 |
262.9 |
2.910 |
2024 |
263.3 |
2.919 |
2025 |
263.7 |
2.929 |
2026 |
264.1 |
2.939 |
2027 |
264.5 |
2.949 |
2028 |
264.9 |
2.959 |
2029 |
265.3 |
2.970 |
2030 |
265.7 |
2.980 |
|
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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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