04375+1509 CHR 153 (V998 Tau)
04h 37m 31.98s +15° 08' 47.2" P.A. 137.00 sep 0.6 mag 7.60,11.10 Sp G0 dist. 50 pc (163.1 l.y.)
Coord 2000 |
04375+1509 |
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Discov num |
CHR 153 |
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Comp |
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Coord arcsec 2000 |
04 37 31.98 +15 08 47.2 |
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Date first |
1989 |
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Date last |
2021 |
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Obs |
18 |
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Pa first |
37 |
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Pa last |
137.2 |
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P.A. Now (θ) |
137.2° |
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Sep first |
0.2 |
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Sep last |
0.615 |
|
Sep. Now (ρ) |
0.615" |
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Mag pri |
7.60 |
|
Mag sec |
11.10 |
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delta mag (ΔM) |
3.5 |
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Spectral class |
G0 (yellow) |
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Pri motion ra |
+103 |
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Sec motion ra |
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Pri motion dec |
-028 |
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Sec motion dec |
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Notes |
N
C
(See Notes, Has orbit and linear solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Var name |
V998 Tau |
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Constellation |
Taurus |
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SAO |
94040 |
|
HIP |
21543 |
|
Tycho2 |
1266-00112-1 |
|
Gaia DR2 |
3309493715722074880 |
|
HD |
29310 |
|
GC |
5629 |
|
BD |
BD+14 728 |
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Distance |
50 |
|
Distance ly |
163.1 |
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ORBITAL ELEMENTS
Period (P) | 124.9y | ± 22.6 |
Periastron (T) | 2049.6y | ± 12.5 |
Semi-major axis (a) | 0.667a | ± 0.08 |
Eccentricity (e) | 0.2 | |
Inclination (i) | 73.7° | ± 1.8 |
Longitude of periastron (ω) | 260.5° | ± 44.3 |
Node (Ω) | 324° | ± 2.2 |
Notes | n | |
Reference | Tok2021b | |
Equinox | | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
99.8 |
0.302 |
2001 |
103.5 |
0.319 |
2002 |
106.8 |
0.337 |
2003 |
109.7 |
0.355 |
2004 |
112.4 |
0.374 |
2005 |
114.8 |
0.392 |
2006 |
117.0 |
0.411 |
2007 |
119.0 |
0.429 |
2008 |
120.8 |
0.447 |
2009 |
122.5 |
0.465 |
2010 |
124.1 |
0.482 |
2011 |
125.5 |
0.499 |
2012 |
126.9 |
0.515 |
2013 |
128.2 |
0.530 |
2014 |
129.4 |
0.545 |
2015 |
130.6 |
0.559 |
2016 |
131.7 |
0.571 |
2017 |
132.7 |
0.583 |
2018 |
133.7 |
0.594 |
2019 |
134.7 |
0.603 |
2020 |
135.7 |
0.612 |
2021 |
136.6 |
0.619 |
2022 |
137.5 |
0.624 |
2023 |
138.4 |
0.629 |
2024 |
139.3 |
0.632 |
2025 |
140.2 |
0.633 |
2026 |
141.1 |
0.633 |
2027 |
142.0 |
0.631 |
2028 |
142.8 |
0.627 |
2029 |
143.7 |
0.622 |
2030 |
144.7 |
0.614 |
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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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SUSPECTED ORBITAL ELEMENTS
Identifier | 04375+1509 |
coord_arcsec_2000 | 043731.98+150847.2 |
Period (P) | 2.0097y | ± 0.0009 |
Periastron (T) | 1999.818y | ± 0.011 |
Semi-major axis (a) | 0.037a | |
Eccentricity (e) | 0.405 | ± 0.014 |
Inclination (i) | 144° | |
Longitude of periastron (ω) | 339.2° | ± 3 |
Node (Ω) | 319.3° | ± 11.1 |
Notes | | |
Reference | Tok2021b | |
Equinox | | |
Last observation | | |
Grade | 9 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
274.2 |
0.024 |
2001 |
144.1 |
0.051 |
2002 |
277.2 |
0.024 |
2003 |
144.7 |
0.051 |
2004 |
280.2 |
0.024 |
2005 |
145.4 |
0.051 |
2006 |
283.3 |
0.024 |
2007 |
146.1 |
0.051 |
2008 |
286.3 |
0.024 |
2009 |
146.8 |
0.051 |
2010 |
289.4 |
0.024 |
2011 |
147.5 |
0.051 |
2012 |
292.6 |
0.024 |
2013 |
148.1 |
0.051 |
2014 |
295.8 |
0.023 |
2015 |
148.8 |
0.051 |
2016 |
299.0 |
0.023 |
2017 |
149.5 |
0.051 |
2018 |
302.2 |
0.023 |
2019 |
150.1 |
0.051 |
2020 |
305.5 |
0.023 |
2021 |
150.8 |
0.051 |
2022 |
308.8 |
0.023 |
2023 |
151.5 |
0.051 |
2024 |
312.2 |
0.023 |
2025 |
152.2 |
0.051 |
2026 |
315.6 |
0.023 |
2027 |
152.8 |
0.051 |
2028 |
319.1 |
0.022 |
2029 |
153.5 |
0.051 |
2030 |
322.6 |
0.022 |
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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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