Coord 2000 | 04179-3348 | Discov num | HMM 2 | Comp | Aa1,2 | Coord arcsec 2000 | 04 17 53.62 -33 47 54.0 | ||||
Date first | 2012 | Date last | 2014 | Obs | 10 | ||||||
Pa first | 313 | Pa last | 33.1 | P.A. Now (θ) | 33.1° | ||||||
Sep first | 0.0 | Sep last | 0.002 | Sep. Now (ρ) | 0.002" | ||||||
Mag pri | 4.60 | Mag sec | 4.65 | delta mag (ΔM) | 0.05 | Spectral class | B9V (blue-white) | ||||
Pri motion ra | +070 | Sec motion ra | |||||||||
Pri motion dec | -034 | Sec motion dec | |||||||||
Notes | N O K (See Notes, Orbital solution, K-band or other infrared magnitudes) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 194902 | 04 17 54 -33 47 54 | HMM 2 Aa1,2 | 2014 | 10 | 33 | 0.0 | 4.60 | 4.65 | 0.05 | Y | <=== | |
Show | 194902 | 04 17 54 -33 47 54 | I 270 Aa,Ab | 1933 | 6 | 343 | 0.1 | 3.56 | 4.00 | 0.44 | |||
Show | Ups4 Eri | 194902 | 04 17 54 -33 47 54 | HUB 3 AB | 2016 | 2 | 163 | 5.5 | 3.87 | 9.90 | 6.03 | ||
Show | 194902 | 04 17 54 -33 47 54 | HJ 3636 AC | 1998 | 3 | 8 | 49.0 | 3.87 | 11.80 | 7.93 |
Constellation | Eridanus | SAO | 194902 | HIP | 20042 | Tycho2 | 7040-01534-1 | ||||
Gaia DR2 | 4870527586936740480 | HD | 27376 | HR | 1347 | GC | 5201 | ||||
CD | CD-34 1614 | CP | CP-34 466 | Bayer | Upsilon 4 Eridani | Bayer name | Ups4 Eri | ||||
Distance | 54.56 | Distance ly | 177.97 | Bayer greek | υ4 Eri |
Identifier | 04179-3348 |
coord_arcsec_2000 | 041753.62-334754.0 |
Period (P) | 120.2478h | ± 0.000019 | Periastron (T) | 54407.7214d (2007.839y) | ± 0.002 | Semi-major axis (a) | 1.902m | ± 0.006 |
Eccentricity (e) | 0 | Inclination (i) | 146.2° | ± 0.1 | Longitude of periastron (ω) | 90° | ||
Node (Ω) | 72° | ± 0.4 | Notes | n | Reference | Hmm2017 | ||
Equinox | 2000 | Last observation | 2014 | Grade | 4 | (1=Definitive, 9=Indet.) |
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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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