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PU Puppis
	Location of PU Puppis (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Puppis
Right ascension	07h 38m 18.04541s
Declination	−25° 21′ 53.3017″
Apparent magnitude (V)	4.69
Characteristics
Spectral type	B8III
U−B color index	−0.35
B−V color index	−0.11
Variable type	β Lyr
Astrometry
Radial velocity (Rv)	+41.00 km/s
Proper motion (μ)	RA: −3.03 mas/yr ; Dec.: −7.42 mas/yr
Parallax (π)	5.27 ± 0.26 mas
Distance	620 ± 30 ly ; (190 ± 9 pc)
Absolute magnitude (MV)	−1.80 ± 0.25; (−1.77 + 5.85)
Absolute bolometric; magnitude (Mbol)	−2.35 + 5.54
Orbit
Period (P)	2.58237 ± 0.00005 d
Semi-major axis (a)	13.30 ± 0.40 R☉
Inclination (i)	56.2°
Details
PU Pup A
Mass	4.10 ± 0.20 M☉
Radius	6.60 ± 0.30 R☉
Luminosity	695 ± 80 L☉
Surface gravity (log g)	3.40 ± 0.05 cgs
Temperature	11500 ± 500 K
Rotational velocity (v sin i)	123 km/s
PU Pup B
Mass	0.65 ± 0.05 M☉
Radius	0.90 ± 0.10 R☉
Luminosity	0.50 ± 0.10 L☉
Surface gravity (log g)	4.30 ± 0.10 cgs
Temperature	5000 ± 350 K
Other designations
	m Puppis, PU Pup, CD-25°4828, CCDM J07383-2522AB, GC 10266, HIP 37173, HR 2944, HD 61429, SAO 174175, WDS J07383-2522AB
Database references
SIMBAD	data

PU Puppis (PU Pup) is a class B8III^[3] (blue giant) star in the constellation Puppis. Its apparent magnitude is 4.69^[2] and it is approximately 620 light years away based on parallax.^[1]

A light curve for PU Puppis, plotted from *TESS* data^[9]

It is a β Lyrae variable, ranging from 4.75 to 4.69 magnitude with a period of 2.58 days.^[5] The secondary is estimated at 5.6 magnitude, although recent observations have failed to confirm it.^[10]^[11] The primary has a mass of 4.10 solar masses, and is radiating at an effective temperature of 11,500 K. The secondary, with a mass 65% that of the Sun, has a surface temperature of about 5,000 K.^[7]

References

^ ^a ^b ^c ^d ^e ^f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
^ ^a ^b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644. Vizier catalog entry
^ ^a ^b Garrison, R. F.; Gray, R. O. (1994). "The late B-type stars: Refined MK classification, confrontation with stromgren photometry, and the effects of rotation". The Astronomical Journal. 107: 1556. Bibcode:1994AJ....107.1556G. doi:10.1086/116967.
^ ^a ^b Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M.Vizier catalog entry
^ ^a ^b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
^ Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. S2CID 119323941.
^ ^a ^b ^c ^d ^e Erdem, Ahmet; Sürgit, Derya; Banks, Timothy S.; Özkardeş, Burcu; Budding, Edwin (2021). "Absolute parameters of young stars: PU Pup". Research in Astronomy and Astrophysics. 21 (10): 256. arXiv:2107.04650. Bibcode:2021RAA....21..256E. doi:10.1088/1674-4527/21/10/256. S2CID 235795134.
^ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789. Vizier catalog entry
^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry
^ Tokovinin, Andrei; Mason, Brian D.; Hartkopf, William I. (2014). "Speckle Interferometry at Soar in 2012 and 2013". The Astronomical Journal. 147 (5): 123. arXiv:1403.4970. Bibcode:2014AJ....147..123T. doi:10.1088/0004-6256/147/5/123. S2CID 118489659.