HD 150248

HD 150248
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
Right ascension 16h 41m 49.80149s[1]
Declination −45° 22′ 07.4106″[1]
Apparent magnitude (V) 7.02[2]
Characteristics
Spectral type G3V + ?[3]
U−B color index +0.17[2]
B−V color index +0.68[2]
Astrometry
Parallax (π)37.54 ± 0.50[1] mas
Distance87 ± 1 ly
(26.6 ± 0.4 pc)
Details
Mass1.020 M☉
Temperature5,723[4] K
Metallicity [Fe/H]−0.04[4] dex
Age6.2 Gyr
Other designations
HD 150248, HIP 81746, CD−45°10847
Database references
SIMBADdata

HD 150248 is a Sun-like star 88 Light-years (26.9809 parsecs) from the Sun. HD 150248 is a G-type star and a near solar twin. HD 150248's photometric color is also very close to that of the Sun; however, it has a lower abundance of metals, and has an apparent visual magnitude of 7.02. At 6.2 billion years old, this star is 2.6 billion years older than our Sun and has passed the stable burning stage. HD 150248 is found on the border between the constellations Scorpius and Ara.

To date, no solar twin with an exact match to that of the Sun has been found. However, there are some stars that come very close to being identical, and thus considered solar twins by the majority of the public. An exact solar twin would be a G2V star with a 5,778K temperature, be 4.6 billion years old, with solar metallicity, and a 0.1% solar luminosity variation.[5] Stars with an age of 4.6 billion years, such as our Sun, are at the most stable state. Proper metallicity and size are also very important to low luminosity variation. [6][7][8]

Morgan-Keenan spectral classification of stars. Most common star type in the universe are M-dwarfs, 76%. The sun is a 4.6 billion year-old G-class (G2V) star and is more massive than 95% of all stars. Only 7.6% are G-class stars

Comparison to the Sun

Identifier J2000 Coordinates Distance
(ly)		 Stellar
Type		 Temperature
(K)		 Metallicity
(dex)		 Age
(Gyr)		 Notes
Right ascension Declination
Sun — — 0.00 G2V 5,778 +0.00 4.6 [9]
HD 150248 [10] 16h 41m 49.8s –45° 22′ 07″ 88 G3V 5,723 −0.04 6.2 [4]

See also

References

  1. 1 2 3 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. 1 2 3 Przybylski, A.; Kennedy, P. M. (1965). "Radial velocities and three-colour photometry of 166 southern stars". Monthly Notices of the Royal Astronomical Society. 131: 95. Bibcode:1965MNRAS.131...95P. doi:10.1093/mnras/131.1.95.
  3. ↑ Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal. 132: 161. arXiv:astro-ph/0603770Freely accessible. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
  4. 1 2 3 Porto de Mello, G. F.; da Silva, R.; da Silva, L.; de Nader, R. V. (March 2014). "A photometric and spectroscopic survey of solar twin stars within 50 parsecs of the Sun; I. Atmospheric parameters and color similarity to the Sun". Astronomy and Astrophysics. 563: A52. arXiv:1312.7571Freely accessible. Bibcode:2014A&A...563A..52P. doi:10.1051/0004-6361/201322277.
  5. ↑ NASA, Science News, Solar Variability and Terrestrial Climate, Jan. 8, 2013
  6. ↑ University of Nebraska-Lincoln astronomy education group, Stellar Luminosity Calculator
  7. ↑ National Center for Atmospheric Research, The Effects of Solar Variability on Earth's Climate, 2012 Report
  8. ↑ Most of Earth’s twins aren’t identical, by Ethan on June 5, 2013
  9. ↑ Williams, D.R. (2004). "Sun Fact Sheet". NASA. Retrieved 2009-06-23.
  10. ↑ HD 150248 at SIMBAD - Ids - Bibliography - Image.


This article is issued from Wikipedia - version of the 11/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.