Theta1 Orionis D is a blue star that can be located in the constellation of Orion. The star can not be seen by the naked eye, you need a telescope to see it.
Theta1 Orionis D is the Bayer Classification for the star. The Id of the star in the Yale Bright Star Catalogue is HR1896. HIP26224 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD37023.
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 D, the location is 05h 35m 17.20 and -05d 23` 15.7 .
Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 24000.0000000 that I have given is based on the Spectral Types page that I have found on the Internet. You might find a different figure, one that may have been calculated rather than generalised that I have done. The figure is always the amount times the luminosity of the Sun. It is an imprecise figure because of a number of factors including but not limited to whether the star is a variable star and distance.
Theta1 Orionis D has a spectral type of B0.5Vp.... This means the star is a blue star. The star is 7920.00000000 Parsecs from the Galactic Centre or terms of Light Years is 25832.1368448000000000s. The star has a B-V Colour Index of 0.08 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 8,626 Kelvin. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.
Theta1 Orionis D has an apparent magnitude of 6.71 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied 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 -1.85 which gave the calculated distance to Theta1 Orionis D as -1763.05 light years away from Earth or -540.54 parsecs. It would take a spaceship travelling at the speed of light, -1763.05 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
The star's Galacto-Centric Distance is 7,920.00 Parsecs or 25,832.14 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.
|Flamsteed Name||41 Orionis|
|Flamsteed Short Name||41 Ori|
|Bayer Designation||Theta1 Orionis D|
|Hipparcos Library I.D.||26224|
|Yale Bright Star Catalogue (HR) Id||1896|
|Henry Draper Designation||37023|
|Visual / Apparent Magnitude||6.71|
|Naked Eye Visible||Requires a 7x50 Binoculars - Magnitudes|
|Right Ascension (R.A.)||05h 35m 17.20|
|Declination (Dec.)||-05d 23` 15.7|
|Galactic Latitude||-19.38 degrees|
|Galactic Longitude||209.01 degrees|
|Distance from Earth||-1.85 Parallax (milliarcseconds)|
|-1763.05 Light Years|
|Galacto-Centric Distance||25,832.14 Light Years / 7,920.00 Parsecs|
|Radial Velocity||31.00 ± 3.70 km/s|
|Luminosity (x the Sun)||24,000.0000000|
|Calculated Effective Temperature||8,626 Kelvin|