Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Eridanus |
Right ascension | 03h 46m 08.53581s [1] |
Declination | −12° 06′ 05.7282″ [1] |
Apparent magnitude (V) | 4.40 [2] (4.38 - 4.44 [3]) |
Characteristics | |
Evolutionary stage | asymptotic giant branch [4] |
Spectral type | M1 III [5] |
U−B color index | +1.96 [2] |
B−V color index | +1.61 [2] |
Variable type | Lb? [3] |
Astrometry | |
Radial velocity (Rv) | 45.2±0.1 [6] km/s |
Proper motion (μ) |
RA: +55.98
[1]
mas/
yr Dec.: +59.28 [1] mas/ yr |
Parallax (π) | 6.78 ± 0.53 mas [1] |
Distance | 480 ± 40
ly (150 ± 10 pc) |
Absolute magnitude (MV) | −1.40 [7] |
Details | |
Radius | 77 [8] R☉ |
Luminosity | 1,123 [9] L☉ |
Temperature | 3,841 [9] K |
Other designations | |
Database references | |
SIMBAD | data |
Pi Eridani, Latinized from π Eridani, is a star in the constellation Eridanus. It has an apparent visual magnitude of 4.40, [2] which is bright enough to be seen on a dark, clear night. Based upon parallax measurements, it is located roughly 480 light years from the Sun.
This is an evolved red giant star with a stellar classification of M1 III, [5] and is currently on the asymptotic giant branch. [4] It is a slow irregular variable type LB that can increase in magnitude up to 4.38. [3] [11] The measured angular diameter of this star is 4.8±0.5 mas. [12] At the estimated distance of Pi Eridani, this yields a physical size of about 77 times the radius of the Sun. [8] It shines with 1,123 [9] times the luminosity of the Sun from an outer atmosphere at an effective temperature of 3,841 K. [9]
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Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Eridanus |
Right ascension | 03h 46m 08.53581s [1] |
Declination | −12° 06′ 05.7282″ [1] |
Apparent magnitude (V) | 4.40 [2] (4.38 - 4.44 [3]) |
Characteristics | |
Evolutionary stage | asymptotic giant branch [4] |
Spectral type | M1 III [5] |
U−B color index | +1.96 [2] |
B−V color index | +1.61 [2] |
Variable type | Lb? [3] |
Astrometry | |
Radial velocity (Rv) | 45.2±0.1 [6] km/s |
Proper motion (μ) |
RA: +55.98
[1]
mas/
yr Dec.: +59.28 [1] mas/ yr |
Parallax (π) | 6.78 ± 0.53 mas [1] |
Distance | 480 ± 40
ly (150 ± 10 pc) |
Absolute magnitude (MV) | −1.40 [7] |
Details | |
Radius | 77 [8] R☉ |
Luminosity | 1,123 [9] L☉ |
Temperature | 3,841 [9] K |
Other designations | |
Database references | |
SIMBAD | data |
Pi Eridani, Latinized from π Eridani, is a star in the constellation Eridanus. It has an apparent visual magnitude of 4.40, [2] which is bright enough to be seen on a dark, clear night. Based upon parallax measurements, it is located roughly 480 light years from the Sun.
This is an evolved red giant star with a stellar classification of M1 III, [5] and is currently on the asymptotic giant branch. [4] It is a slow irregular variable type LB that can increase in magnitude up to 4.38. [3] [11] The measured angular diameter of this star is 4.8±0.5 mas. [12] At the estimated distance of Pi Eridani, this yields a physical size of about 77 times the radius of the Sun. [8] It shines with 1,123 [9] times the luminosity of the Sun from an outer atmosphere at an effective temperature of 3,841 K. [9]
{{
citation}}
: External link in |postscript=
(
help)CS1 maint: postscript (
link)
{{
cite web}}
: CS1 maint: postscript (
link)