Theta1 Orionis A is a blue star that can be located in the constellation of Orion. Theta1 Orionis A is the Bayer Classification for the star. HIP26220 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD37020. Theta1 Orionis A has alternative name(s), 41 Orionis , 41 Ori. Theta1 Orionis A is a multiple star system with 4 stars orbiting in its solar system.
The location of the star in the galaxy is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the star is compared to the celestial equator and is expressed in degrees. For Theta1 Orionis A, the location is 05h 35m 15.82 and -05 d 23 ` 14.3 .
Theta1 Orionis A has a spectral type of O7. This means the star is a blue star.
Theta1 Orionis A has an apparent magnitude of 4.98 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.
Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -2.00 which gave the calculated distance to Theta1 Orionis A as -1630.82 light years away from Earth or -500 parsecs. It would take a spaceship travelling at the speed of light, -1630.82 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
|Short Name||41 Ori|
|Bayer Designation||Theta1 Orionis A|
|Alternative Name(s)||41 Orionis|
|Hipparcos Library I.D.||26220|
|Henry Draper Designation||37020|
|Right Ascension (R.A.)||05h 35m 15.82|
|Declination (Dec.)||-05 d 23 ` 14.3|
|1997 Distance from Earth||-2.00 Parallax (milliarcseconds)|
|-1630.82 Light Years|
|Stars in Solar System||4|
The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.
|Proper Motion mas/yr|
|H.D. Id||B.D. Id||Star Code||Magnitude||R.A.||Dec.||Spectrum||Colour||Year|