04404+1631 CHR 154 (HD 29608)
04h 40m 25.41s +16° 30' 49.4" P.A. 180.00 sep 0.5 mag 9.79,11.54 Sp K0 dist. 249.38 pc (813.48 l.y.)
| Coord 2000 |
04404+1631 |
|
Discov num |
CHR 154 |
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Comp |
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Coord arcsec 2000 |
04 40 25.41 +16 30 49.4 |
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| Date first |
1991 |
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Date last |
2021 |
|
Obs |
18 |
|
| Pa first |
353 |
|
Pa last |
179.6 |
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P.A. Now (θ) |
181.7° |
|
| Sep first |
0.5 |
|
Sep last |
0.469 |
|
Sep. Now (ρ) |
0.468" |
|
| Mag pri |
9.79 |
|
Mag sec |
11.54 |
|
delta mag (ΔM) |
1.75 |
|
Spectral class |
K0 (yellow-orange) |
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| Pri motion ra |
+094 |
|
Sec motion ra |
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| Pri motion dec |
-020 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 29608 |
|
Constellation |
Taurus |
|
HIP |
27162 |
|
Tycho2 |
1267-00210-1 |
|
| Gaia DR2 |
3310104945405441920 |
|
HD |
29608 |
|
BD |
BD+16 640 |
|
Distance |
249.38 |
|
| Distance ly |
813.48 |
|
ORBITAL ELEMENTS
| Period (P) | 68.2y | ± 4.9 |
Periastron (T) | 2007.61y | ± 0.42 |
Semi-major axis (a) | 0.469a | ± 0.009 |
| Eccentricity (e) | 0.16 | ± 0.05 |
Inclination (i) | 64.5° | ± 1.1 |
Longitude of periastron (ω) | 266.2° | ± 3.4 |
| Node (Ω) | 179.2° | ± 0.6 |
Notes | n | |
Reference | Tok2021f | |
| Equinox | | |
Last observation | 2020 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
14.4 |
0.366 |
| 2001 |
18.3 |
0.340 |
| 2002 |
23.0 |
0.311 |
| 2003 |
28.7 |
0.281 |
| 2004 |
35.7 |
0.250 |
| 2005 |
44.6 |
0.221 |
| 2006 |
56.1 |
0.195 |
| 2007 |
70.5 |
0.177 |
| 2008 |
87.1 |
0.170 |
| 2009 |
103.9 |
0.175 |
| 2010 |
118.9 |
0.191 |
| 2011 |
131.0 |
0.215 |
| 2012 |
140.4 |
0.244 |
| 2013 |
147.8 |
0.274 |
| 2014 |
153.7 |
0.305 |
| 2015 |
158.5 |
0.335 |
| 2016 |
162.6 |
0.362 |
| 2017 |
166.1 |
0.387 |
| 2018 |
169.2 |
0.409 |
| 2019 |
172.0 |
0.427 |
| 2020 |
174.6 |
0.442 |
| 2021 |
177.1 |
0.454 |
| 2022 |
179.4 |
0.463 |
| 2023 |
181.7 |
0.468 |
| 2024 |
184.0 |
0.469 |
| 2025 |
186.2 |
0.468 |
| 2026 |
188.5 |
0.464 |
| 2027 |
190.8 |
0.457 |
| 2028 |
193.2 |
0.447 |
| 2029 |
195.7 |
0.436 |
| 2030 |
198.4 |
0.422 |
|
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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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