04179-3348 HMM 2 Aa1,2
04h 17m 53.62s -33° 47' 54.0" P.A. 33.00 sep 0.0 mag 4.60,4.65 Sp B9V dist. 54.56 pc (177.97 l.y.)
Coord 2000 |
04179-3348 |
|
Discov num |
HMM 2 |
|
Comp |
Aa1,2 |
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Coord arcsec 2000 |
04 17 53.62 -33 47 54.0 |
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Date first |
2012 |
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Date last |
2014 |
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Obs |
10 |
|
Pa first |
313 |
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Pa last |
33.1 |
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P.A. Now (θ) |
33.1° |
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Sep first |
0.0 |
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Sep last |
0.002 |
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Sep. Now (ρ) |
0.002" |
|
Mag pri |
4.60 |
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Mag sec |
4.65 |
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delta mag (ΔM) |
0.05 |
|
Spectral class |
B9V (blue-white) |
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Pri motion ra |
+070 |
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Sec motion ra |
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Pri motion dec |
-034 |
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Sec motion dec |
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Notes |
N
O
K
(See Notes, Orbital solution, K-band or other infrared magnitudes) |
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Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
04179-3348 SYSTEM COMPONENTS
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 |
|
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Quintuple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
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 |
|
SUSPECTED ORBITAL ELEMENTS
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.) |
label |
theta |
rho |
2000 |
139.3 |
0.002 |
2001 |
182.8 |
0.002 |
2002 |
221.2 |
0.002 |
2003 |
252.9 |
0.002 |
2004 |
284.8 |
0.002 |
2005 |
323.6 |
0.002 |
2006 |
7.2 |
0.002 |
2007 |
44.6 |
0.002 |
2008 |
76.0 |
0.002 |
2009 |
108.4 |
0.002 |
2010 |
148.1 |
0.002 |
2011 |
191.4 |
0.002 |
2012 |
228.0 |
0.002 |
2013 |
259.2 |
0.002 |
2014 |
292.1 |
0.002 |
2015 |
332.5 |
0.002 |
2016 |
15.6 |
0.002 |
2017 |
51.4 |
0.002 |
2018 |
82.3 |
0.002 |
2019 |
115.8 |
0.002 |
2020 |
157.1 |
0.002 |
2021 |
199.6 |
0.002 |
2022 |
234.6 |
0.002 |
2023 |
265.5 |
0.002 |
2024 |
299.7 |
0.002 |
2025 |
341.6 |
0.002 |
2026 |
23.6 |
0.002 |
2027 |
57.9 |
0.002 |
2028 |
88.8 |
0.002 |
2029 |
123.6 |
0.002 |
2030 |
166.1 |
0.002 |
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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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