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40 Eridani
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Star 40 Eridani

Triple star system 40 Eridani is located 16 light years away from the Sun. It is a system with 3 stars. There is at least one exoplanet in this system.
Sun distance
16 light years
galaxy map

40 Eridani A

Orange star (spectral class K0.5 V)
flare star

Location

Ascension iconRight ascension: 4h 15m 13.911s
Declination iconDeclination: -7° 40' 5.08'' (equatorial region)
Parallax iconParallax: 199.608
Distance iconSun distance: 16.34 ly | 5 pc

Basic characteristic

icon weight
Mass: 84 % M Sun | 880 M Jupiter
radius icon
Size: 81 % R Sun | 8.1 R Jupiter
temperature iconTemperature: 5202 K | 0.9 T Sun
time iconAge: 6.9 billions years | 1.5 Sun
luminosity iconLuminosity: 0.457 L Sun

1 exoplanet

 40 Eridani A b
unconfirmed
 0.22 AU 8.5 M⊕ -

Photometry

Magnitude iconApparent magnitude (V): 4.4
Magnitude iconAbsolute magnitude (V): 5.9
5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).

40 Eridani B

White dwarf (spectral class DA4)
flare star

Location

Distance iconDistance from the primary: 400 AU

Basic characteristic

icon weight
Mass: 57.3 % M Sun | 600 M Jupiter
radius icon
Size: 1.4 % R Sun | 0.1 R Jupiter
luminosity iconLuminosity: 0.13 L Sun
(No known exoplanets yet)

Photometry

5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).

40 Eridani C

Red dwarf (spectral class M4.5 V)
flare star

Location

Distance iconDistance from the primary: 400 AU

Basic characteristic

icon weight
Mass: 20.4 % M Sun | 213 M Jupiter
radius icon
Size: 31 % R Sun | 3.1 R Jupiter
temperature iconTemperature: 3167 K | 0.55 T Sun
time iconAge: 5.6 billions years | 1.22 Sun
luminosity iconLuminosity: 0.008 L Sun
(No known exoplanets yet)

Photometry

Magnitude iconApparent magnitude (V): 11.2
Magnitude iconAbsolute magnitude (V): 12.7
5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
More about 40 Eridani
      40 Eridani can be found in southern celestial hemisphere, and it is possible to see it with naked eye. The star is also observable from Northern America, Europe and Asia.
Other designations of this star
DY Eri, BD-07°781 C, LHS 25, LTT 1909, omi02 Eri C, BD-07° 781, G 160-060, HD 26976, LHS 24, LTT 1908, SAO 131065, omi02 Eri B, Keid, Omicron² Eridani, 40 Eri, Gliese 166, HD 26965, HIP 19849, HR 1325, LHS 23, LTT 1907, SAO 131063, BD-07° 780, omi02 Eri, Gaia EDR3 3195919528989223040
External sources
icon study
Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions
Scientific study, Accepted: 28. 02. 2023
simbad icon
Simbad database (* omi02 Eri C)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 3195919254111314816)
Archive from the Gaia mission
Closest stars

 2MASS 0415−0935
 0.03 M☉ 2.4 ly

Gliese 3323
 0.16 M☉ 3.6 ly

Gliese 205
 0.56 M☉ 6.3 ly

Epsilon Eridani
 0.82 M☉ 6.3 ly

2MASS J0254+0223
 0.06 M☉ 6.8 ly
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