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S Normae information


S Normae
Location of S Normae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Norma
Right ascension 16h 18m 51.8325s[1]
Declination −57° 53′ 59.244″[1]
Apparent magnitude (V) 6.394[2] (6.12 - 6.77[3])
Characteristics
Spectral type F8-G0Ib[3] + B9.5V[4]
U−B color index +0.66[5]
B−V color index +1.00[5]
Variable type δ Cepheid[3]
Astrometry
Radial velocity (Rv)5.83[6] km/s
Proper motion (μ) RA: 0.07[1] mas/yr
Dec.: 0.04[1] mas/yr
Parallax (π)1.16 ± 0.76 mas[1]
Distance924[2] pc
Absolute magnitude (MV)-4.02[4]
Orbit[4]
Period (P)8,660 yr
Semi-major axis (a)794 AU
Details[4]
Mass6.3 M☉
Radius65.6[2] R☉
Luminosity3,630 L☉
Temperature6,350 K
Metallicity+0.10[7]
companion
Mass2.4 M☉
Age80[8] Myr
Other designations
S Nor, HR 6062, SAO 243586, CD−57°6342, GSC 08719-00158, HD 146323, NGC 6087 132, GC 21898, HIP 79932, NGC 6087 155
Database references
SIMBADdata
S Normae is the brightest member of the open cluster NGC 6087.

S Normae (S Nor) is a yellow supergiant variable star in the constellation Norma. It is the brightest member of the open cluster NGC 6087.

S Normae is a Classical Cepheid variable with a visual magnitude range of 6.12 to 6.77 and a period of 9.75411 days. The spectral type varies during the pulsation cycle from F8 to G0. Its mass has been measured at 6.3 M☉ with reference to a close orbital companion, and it is over 3,000 times as luminous as the sun.

  1. ^ a b c d e 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.
  2. ^ a b c Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv:astro-ph/0507076. Bibcode:2005AcA....55..247M.
  3. ^ a b c 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.
  4. ^ a b c d Cite error: The named reference evans13 was invoked but never defined (see the help page).
  5. ^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  6. ^ Mermilliod, J. C.; Mayor, M.; Udry, S. (2008). "Red giants in open clusters. XIV. Mean radial velocities for 1309 stars and 166 open clusters". Astronomy and Astrophysics. 485 (1): 303–314. Bibcode:2008A&A...485..303M. CiteSeerX 10.1.1.30.7545. doi:10.1051/0004-6361:200809664.
  7. ^ Klagyivik, P.; Szabados, L. (2009). "Observational studies of Cepheid amplitudes. I. Period-amplitude relationships for Galactic Cepheids and interrelation of amplitudes". Astronomy and Astrophysics. 504 (3): 959. arXiv:0908.3561. Bibcode:2009A&A...504..959K. doi:10.1051/0004-6361/200811464. S2CID 18283579.
  8. ^ Netopil, M.; Paunzen, E.; Heiter, U.; Soubiran, C. (2016). "On the metallicity of open clusters. III. Homogenised sample". Astronomy & Astrophysics. 585: A150. arXiv:1511.08884. Bibcode:2016A&A...585A.150N. doi:10.1051/0004-6361/201526370. S2CID 118382876.

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S Normae

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S Normae (S Nor) is a yellow supergiant variable star in the constellation Norma. It is the brightest member of the open cluster NGC 6087. S Normae is...

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NGC 6087

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known as Caldwell 89 or the S Normae Cluster) is an open cluster of 40 or more stars centered on the Cepheid variable S Normae in the constellation Norma...

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Caldwell catalogue

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the original list have since been corrected: it incorrectly identified the S Norma Cluster (NGC 6087) as NGC 6067 and incorrectly labelled the Lambda Centauri...

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List of open clusters

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astronomical objects List of globular clusters Lists of clusters Dias W.S.; Alessi B.S.; Moitinho A.; Lepine J.R.D. (July 2002). "New catalog of optically...

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Zeta Normae

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Zeta Normae, Latinised from ζ Normae, is a solitary, yellow-white hued star in the southern constellation of Norma. With an apparent visual magnitude...

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Normae Congregationis

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Normae Congregationis (NC) is a 1978 document written by the Vatican's Congregation for the Doctrine of the Faith (CDF) which sets guidelines for Catholic...

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Mu Normae

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μ Normae, Latinised as Mu Normae, is a blue supergiant star of spectral type O9.7 Iab, located in the constellation of Norma. It shines as bright as 339...

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Melotte catalogue

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Australe 6.0 Mel 140 NGC 6067 Open cluster Norma 6.5 Mel 141 NGC 6087 S Normae Cluster Open cluster Norma 5.4 Mel 142 NGC 6093 Globular cluster Scorpius...

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Gamma2 Normae

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Gamma2 Normae, Latinized from γ2 Nor, is the brightest star in the southern constellation of Norma. Its apparent magnitude is 4.02 – making it a faint...

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Collinder catalogue

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2016. "Cl Collinder 463". sim-id. Retrieved 2020-06-10. Archinal, B. A., and S. J. Hynes. 2003. Star Clusters, Richmond, VA: Willmann-Bell "The Collinder...

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T Normae

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T Normae is a Mira variable star. It is located midway between Eta Normae and Gamma Circini. It ranges from magnitude 6.2 to 13.6 and a period of 244...

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QV Normae

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QV Normae, also known as Norma X-2, is a high mass X-ray binary star system in the constellation Norma. It varies between apparent magnitudes of 16.19...

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HR 4180

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2011-02-14. Retrieved 2018-08-13. Eggen, O. J. (June 15, 1980). "VY Carinae, S Normae, and photometric luminosities for bright giants and supergiants of types...

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N Scorpii

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the naked eye. N Scorpii was initially given the Bayer designation Alpha Normae by Lacaille but it was later moved from Norma to Scorpius. N Scorpii is...

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HD 143183

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39 ly). HD 143183 is catalogued with the variable star designation V558 Normae as its brightness varies irregularly between apparent magnitudes 7.3 and...

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Iota1 Normae

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Iota1 Normae (ι1 Normae) is a triple star system in the southern constellation of Norma. With a combined apparent visual magnitude of 4.69, it is faintly...

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QU Normae

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QU Normae, also known as HR 6131, is a blue supergiant star in the constellation Norma. It is also a variable star, thought to be an α Cyg variable. The...

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R Normae

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R Normae is a Mira variable star located near Eta Normae in the southern constellation of Norma. This is an intermediate-mass red giant star that is generating...

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Iota2 Normae

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ι2 Normae, Latinised as Iota2 Normae, is a single, blue-white star located in the southern constellation of Norma. It is positioned to the west of Rigil...

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Kappa Normae

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Kappa Normae, Latinized from κ Normae, is a solitary, yellow hued star in the southern constellation of Norma. Its apparent magnitude is 4.94, which is...

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Table of stars with Bayer designations

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Telescopium Lacaille's Beta Normae (β Nor, β Normae) was reassigned to Scorpius – Star Tales – Norma Lacaille's Alpha Normae (α Nor, α Normae) was reassigned to...

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Gamma1 Normae

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Gamma1 Normae, Latinized from γ1 Normae, is a single, yellow-white hued star in the southern constellation of Norma. It is faintly visible to the naked...

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Eta Normae

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Eta Normae, Latinized from η Normae, is a single star in the southern constellation of Norma. It is visible to the naked eye as a faint, yellow-hued star...

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Delta Normae

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Delta Normae, Latinised from δ Normae, is a star system in the southern constellation of Norma. It is visible to the naked eye with an apparent visual...

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Epsilon Normae

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Epsilon Normae, Latinised from ε Normae, is a blue-white hued triple star system in the southern constellation of Norma. It has an apparent visual magnitude...

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Lambda Normae

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λ Normae, Latinised as Lambda Normae, is a binary star system in the southern constellation of Norma, located near the northern constellation boundary...

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V378 Normae

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V378 Normae (also known as HR 6120) is a very luminous supergiant type star in the constellation Norma. It is a likely Cepheid variable with a range of...

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NGC 6067

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cluster in the constellation Norma. It is located to the north of Kappa Normae, with an angular diameter of 12′. Visible to the naked eye in dark skies...

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Dicastery for the Doctrine of the Faith

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Fernández published a 2024 text signed by Pope Francis which replaced the 1978 Normae Congregationis rulings. It sets new norms and guidelines for Catholic bishops...

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