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Theta Leonis information


θ Leonis
Location of θ Leonis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Leo
Right ascension 11h 14m 14.40446s[1]
Declination +15° 25′ 46.4541″[1]
Apparent magnitude (V) +3.324[2]
Characteristics
Spectral type A2 V[3]
U−B color index +0.07[2]
B−V color index –0.02[2]
Astrometry
Radial velocity (Rv)+7.6[4] km/s
Proper motion (μ) RA: -60.31[1] mas/yr
Dec.: -79.10[1] mas/yr
Parallax (π)19.76 ± 0.17 mas[1]
Distance165 ± 1 ly
(50.6 ± 0.4 pc)
Absolute magnitude (MV)−0.19[5]
Details
Mass2.5[6] M
Luminosity141[6] L
Surface gravity (log g)3.65[7] cgs
Temperature9,350[7] K
Metallicity [Fe/H]+0.05[7] dex
Rotational velocity (v sin i)23[8] km/s
Age550[7] Myr
Other designations
Chertan, Chort, Coxa, θ Leo, Theta Leo, 70 Leo, HR 4359, BD+16 2234, HD 97633, SAO 99512, FK5 423, HIP 54879.[9]
Database references
SIMBADdata

Theta Leonis, Latinized from θ Leonis, formally named Chertan,[10] is a star in the constellation of Leo. With an apparent visual magnitude of +3.324[2] it is visible to the naked eye and forms one of the brighter stars in the constellation. The distance from the Sun can be directly determined from parallax measurements, yielding a value of about 165 light-years (51 parsecs).[1]

  1. ^ a b c d e f Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference aj74_375 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference scfs was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference apj663_1_365 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference aaa274_2_335 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa463_2_671 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ "List of IAU-approved Star Names". Retrieved 17 January 2023.

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Theta Leonis

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Theta Leonis, Latinized from θ Leonis, formally named Chertan, is a star in the constellation of Leo. With an apparent visual magnitude of +3.324 it is...

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was discovered by William Herschel 1784. It is located below the star Theta Leonis (Chertan). It is a member of the Leo II Groups, a series of galaxies...

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to an asterism consisting of Beta Virginis, Sigma Leonis, Iota Leonis, Theta Leonis and Delta Leonis. Consequently, the Chinese name for Beta Virginis...

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{\displaystyle 1\leqslant p\leqslant \infty ,\ 0<\theta <1,\ s=(1-\theta )k+\theta (k+1)=k+\theta .} Another approach to define fractional order Sobolev...

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Total variation

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N ∗ {\displaystyle \theta _{N}^{*}} which is the up to ε {\displaystyle \varepsilon } approximation of θ N {\displaystyle \theta _{N}} in C c 1 {\displaystyle...

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Ursa Minor

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A.P.; Kim, K.-M. (2014). "Planetary Companions in K giants β Cancri, μ Leonis, and β Ursae Minoris". Astronomy and Astrophysics. 566: 7. arXiv:1405.2127...

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Population index

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Geminids) Herculids (tau Herculids) Hydrids (sigma Hydrids) Leonids Leonis Minorids (Dec. Leonis Minorids) Lyrids eta Lyrids June Lyrids Monocerotids alpha Monocerotids...

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; Kim, K.-M. (June 2014). "Planetary companions in K giants β Cancri, μ Leonis, and β Ursae Minoris". Astronomy and Astrophysics. 566 (A67): 7. arXiv:1405...

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Interpolation space

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X_{1}\right)_{\theta _{0}},\left(X_{0},X_{1}\right)_{\theta _{1}}\right)_{\theta }=(X_{0},X_{1})_{\eta },\qquad \eta =(1-\theta )\theta _{0}+\theta \theta _{1}...

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