04170+1941 HO 328 (HD 27028)
04h 17m 01.22s +19° 40' 32.6" P.A. 358.00 sep 0.4 mag 7.38,9.06 Sp F5V dist. 84.53 pc (275.74 l.y.)
Coord 2000 |
04170+1941 |
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Discov num |
HO 328 |
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Comp |
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Coord arcsec 2000 |
04 17 01.22 +19 40 32.6 |
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Date first |
1890 |
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Date last |
2016 |
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Obs |
96 |
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Pa first |
356 |
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Pa last |
357.5 |
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P.A. Now (θ) |
352.5° |
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Sep first |
0.4 |
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Sep last |
0.441 |
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Sep. Now (ρ) |
0.345" |
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Mag pri |
7.38 |
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Mag sec |
9.06 |
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delta mag (ΔM) |
1.68 |
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Spectral class |
F5V (yellow-white) |
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Pri motion ra |
+001 |
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Sec motion ra |
+001 |
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Pri motion dec |
-101 |
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Sec motion dec |
-101 |
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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 27028 |
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Constellation |
Taurus |
|
SAO |
93840 |
|
HIP |
19975 |
|
Tycho2 |
1272-00227-1 |
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Gaia DR2 |
48622263902636928 |
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HD |
27028 |
|
ADS |
3102 |
|
BD |
BD+19 689 |
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Distance |
84.53 |
|
Distance ly |
275.74 |
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ORBITAL ELEMENTS
Period (P) | 63.3y | |
Periastron (T) | 1972.4y | |
Semi-major axis (a) | 0.358a | |
Eccentricity (e) | 0.98 | |
Inclination (i) | 130° | |
Longitude of periastron (ω) | 263° | |
Node (Ω) | 81.8° | |
Notes | n | |
Reference | Hei1978a | |
Equinox | 2000 | |
Last observation | 1976 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
4.4 |
0.457 |
2001 |
4.0 |
0.459 |
2002 |
3.5 |
0.460 |
2003 |
3.1 |
0.461 |
2004 |
2.6 |
0.460 |
2005 |
2.2 |
0.460 |
2006 |
1.8 |
0.459 |
2007 |
1.3 |
0.457 |
2008 |
0.9 |
0.455 |
2009 |
0.4 |
0.452 |
2010 |
359.9 |
0.448 |
2011 |
359.5 |
0.444 |
2012 |
359.0 |
0.440 |
2013 |
358.5 |
0.434 |
2014 |
358.0 |
0.428 |
2015 |
357.5 |
0.422 |
2016 |
357.0 |
0.415 |
2017 |
356.4 |
0.407 |
2018 |
355.8 |
0.399 |
2019 |
355.2 |
0.389 |
2020 |
354.6 |
0.380 |
2021 |
353.9 |
0.369 |
2022 |
353.2 |
0.357 |
2023 |
352.5 |
0.345 |
2024 |
351.7 |
0.331 |
2025 |
350.8 |
0.317 |
2026 |
349.8 |
0.302 |
2027 |
348.7 |
0.285 |
2028 |
347.5 |
0.267 |
2029 |
346.1 |
0.247 |
2030 |
344.4 |
0.226 |
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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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