Miaplacidus, a white giant star in Carina
Miaplacidus is a white giant star in the constellation Carina. At 113 light years away, it is the 29th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 1.67.
Miaplacidus (HIP 45238)
Miaplacidus is a white giant star in the constellation Carina. At 113 light years away, it is the 29th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 1.67. It is moving through the Galaxy at a speed of 31.8 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,600 and 31,700 light years from the center of the Galaxy.
Sky position: RA 9h 13.2m, Dec -69° 43.2'
Common designations: Miaplacidus, Beta Carinae, HIP 45238, HD 80007, Gliese 9292
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Brightest stars in Carina:
(list all)
1
| -0.62
) Canopus
2
| 1.67
) Miaplacidus
| Rank | Mag. | Star |
| 3 | 1.86 | Avior |
| 4 | 2.21 | Tureis |
| 5 | 2.74 | Theta Carinae |
| 6 | 2.92 | Upsilon Carinae |
| 7 | 3.29 | Omega Carinae |
| 8 | 3.30 | p Carinae |
| 9 | 3.39 | q Carinae |
| 10 | 3.43 | a Carinae |
| 11 | 3.46 | chi Carinae |
| 12 | 3.69 | l Carinae |
| 13 | 3.78 | u Carinae |
| 14 | 3.81 | s Carinae |
| 15 | 3.84 | c Carinae |
| 16 | 3.93 | x Carinae |
| 17 | 3.96 | i Carinae |
Galactic Orbit of Miaplacidus
(compared to the Sun)
E
ccentricity: 14.8% vs. 16.0%Angle φ : -33.9°vs. 26.0°
Semi-major axis : 8,484 pc vs. 8,686 pc
Semi-minor axis: 8,390 pc vs. 8,574 pc
Focus-to-center
: 1,255 pcvs. 1,388 pcSemilatus rectum : 8,298 pc vs. 8,464 pc
Perigalacticon: 7,229 pc vs. 7,297 pc
Apogalacticon
: 9,739 pcvs. 10,074 pcSome Tabulated XHIP Data for Miaplacidus
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 138.30100317° ±0.11 mas | -156.47 ±0.14 mas/yr. |
| Declination: | -69.71747241° ±0.10 mas | 108.95 ±0.11 mas/yr. |
| Galactic Longitude: | 285.97886608° | -185.30 mas/yr. |
| Galactic Latitude: | -14.40721083° | -44.90 mas/yr. |
Parallax: 28.82 ± 0.11 mas
Spectrography
Spectral Type: A1III- 2006AJ....132..161G.
Radial Velocity: -5.10 ±2.30 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
B
1.74
-0.96
V
1.67
-1.03
R
I
1.66
-1.05
J
1.49
-1.21
H
1.50
-1.20
K
1.49
-1.21
B-V: +0.07 V-I: +0.01
Derivations
Heliocentric distance: 34.70 pc (0.4% margin of error)
Galactocentric distance: 7,391 pc
Transverse velocity: 31.4 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 9.3 pc | -32.3 pc | -8.6 pc |
| Velocity (U, V, W) | -31.2 km/s | -1.9 km/s | -5.9 km/s |