10 Lacertae

10 Lacertae
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
10 Lacertae in Celestia
Constellation	Lacerta
Right ascension	22^h 39^m 15.67864^s ^[1]
Declination	+39° 03′ 00.9712″ ^[1]
Spectral type	O9V ^[1]

10 Lacertae (10 Lac) is a star in the constellation Lacerta. Its apparent magnitude is 4.88. Located around 529 parsecs (1,730 ly) distant, it is a hot blue main-sequence star of spectral type O9V,^[1] a massive star that is currently fusing its core hydrogen. 10 Lacertae was one of the first O-type stars (along with S Monocerotis) to be defined as an anchor point for the MKK spectral classification; since the early twentieth century it has served as such a point. Specifically, the star is representative of O9V stars, meaning relatively cool O-type stars on the main-sequence.^[2]

References

1 2 3 4 "10 Lacertae". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 6 January 2014.
↑ Garrison, R. F. (1994). "A Hierarchy of Standards for the MK Process". Astronomical Society of the Pacific 60: 3. Bibcode:1994ASPC...60....3G.

Stars of Lacerta

Bayer	α β

Flamsteed	1 2 4 5 6 8 9 10 11 12 13 14 15 16

Variable	S U V X Y Z RR RT RW SS SW VX VY AR AW BG CM CO CP CZ DE DI DK EV EW GL HK HT PP V345 V350 V362 V364 V365 V377 V399 V405 V416 V424

HR	8422 8424 8429 8445 8463 8485 8487 8489 8510 8519 8536 8549 8553 8588 8589 8594 8606 8607 8609 8617 8626 8633 8643 8648 8651 8652 8654 8661 8666 8678 8682 8688 8692 8705 8708 8712 8718 8723 8733

HD	211660 212334 215473

Other	ADS 16402 HAT-P-40 IRAS 22223+4327 IRAS 22272+5435 PSR B2217+47 SAO 51891

List

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