Nu Fornacis

Nu Fornacis

A light curve for Nu Fornacis plotted from TESS data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Fornax
Right ascension 02h 04m 29.43861s[2]
Declination −29° 17′ 48.5477″[2]
Apparent magnitude (V) 4.69[3] (4.68 – 4.73[4])
Characteristics
Spectral type B9.5IIIspSi[5]
U−B color index −0.51[3]
B−V color index −0.17[3]
Variable type α2 CVn[6]
Astrometry
Radial velocity (Rv)+18.50[7] km/s
Proper motion (μ) RA: +12.79[8] mas/yr
Dec.: +8.48[8] mas/yr
Parallax (π)8.79 ± 0.26 mas[2]
Distance370 ± 10 ly
(114 ± 3 pc)
Absolute magnitude (MV)−0.60[9]
Details
Mass3.65±0.18[10] M☉
Radius3.44[11] R☉
Luminosity245[10] L☉
Temperature13,400[12] K
Rotation1.89[12] d
Rotational velocity (v sin i)50±5[12] km/s
Other designations
ν For, CD−29°706, FK5 1055, GC 2506, HD 12767, HIP 9677, HR 612, SAO 167532[8]
Database references
SIMBADdata

Nu Fornacis, Latinized from ν Fornacis, is a single,[13] variable star in the southern constellation of Fornax. It is blue-white in hue and faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 4.69.[3] This body is located approximately 370 light years distant from the Sun based on parallax,[2] and is drifting further away with a radial velocity of +18.5 km/s.[7] It is a candidate member of the Pisces-Eridanus stellar stream, which suggests an age of 120 million years or less.[14]

This object is an Ap star[15] with a stellar classification of B9.5IIIspSi[5] matching a late B-type giant star. The 'Si' suffix indicates an abundance anomaly of silicon. It is an Alpha2 Canum Venaticorum variable that ranges from magnitude 4.68 down to 4.73 with a period of 1.89 days – the same as its rotational period.[6][12] It is 3.65 times as massive and 245 times as luminous as the Sun,[10] with 3.44 times the Sun's diameter.[11]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Wilson1953 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference aaa334_181 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference shulyak2014 was invoked but never defined (see the help page).
  12. ^ a b c d Cite error: The named reference Leone 2000 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Curtis2019 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Chen2017 was invoked but never defined (see the help page).