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  • Thumbnail for Leo (constellation)
    night sky at the infrared N-band (10 μm wavelength). The star SDSS J102915+172927 (Caffau's star) is a population II star in the galactic halo seen in Leo...
    16 KB (1,781 words) - 20:13, 23 August 2024
  • Thumbnail for NGC 3799
    background is 3,659 ± 24 km/s, which corresponds to a Hubble distance of 54.0 ± 3.8 Mpc (~176 million ly). NGC 3799 was discovered by British astronomer...
    4 KB (447 words) - 18:15, 13 November 2024
  • enough to be seen with the naked eye. Based upon an annual parallax shift of 0.02628 arc seconds as measured by the Hipparcos satellite, this system is 124...
    12 KB (956 words) - 11:10, 12 November 2024
  • star system with an orbital period of 116.8 years and an eccentricity of 0.56. In 2010, speckle interferometry observations showed an angular separation...
    9 KB (610 words) - 08:38, 23 August 2024
  • (Noquisi) GJ 3685 HVS 7 K2-3 K2-18 2MASSI J0937347+293142 2MASS J10475385+2124234 MACS J1149 Lensed Star 1 PSR B0943+10 PSR B0950+08 SDSS J102915+172927...
    7 KB (500 words) - 19:25, 22 August 2024
  • apparent visual magnitude of 4.32 Based upon an annual parallax shift of 0.00991 arcseconds, it is located about 329 light-years from the Sun. At that...
    9 KB (646 words) - 19:38, 1 September 2024
  • Thumbnail for Nu Leonis
    this distance, the visual extinction from interstellar dust is 0.33 magnitudes. It is 0.05 degree north of the ecliptic, so it can be occulted by the moon...
    8 KB (550 words) - 08:29, 23 August 2024
  • rotation is too small to be measured, with a projected rotational velocity of 0.0 km/s. The chemical abundance of elements other than hydrogen and helium,...
    8 KB (600 words) - 11:19, 12 November 2024
  • Thumbnail for Xi Leonis
    the zodiac constellation of Leo. It has an apparent visual magnitude of 5.0 and is faintly visible to the naked eye. The distance to this star, as determined...
    7 KB (436 words) - 16:17, 23 August 2023
  • relatively high proper motion, traversing the celestial sphere at the rate of 0.379 arc seconds per annum. The primary member of the system, component A,...
    9 KB (667 words) - 12:18, 17 July 2024
  • the visual magnitude of the star is diminished by an absorption factor of 0.3 due to interstellar dust. Psi Leonis is an evolved red giant star with a...
    6 KB (453 words) - 15:45, 2 December 2024
  • (Noquisi) GJ 3685 HVS 7 K2-3 K2-18 2MASSI J0937347+293142 2MASS J10475385+2124234 MACS J1149 Lensed Star 1 PSR B0943+10 PSR B0950+08 SDSS J102915+172927...
    10 KB (736 words) - 02:02, 23 August 2024
  • Sun's mass and nearly twice the Sun's radius. The companion is a magnitude 11.0 star at an angular separation of 4.1″ along a position angle of 264°, as of...
    7 KB (493 words) - 23:19, 22 August 2024
  • (Noquisi) GJ 3685 HVS 7 K2-3 K2-18 2MASSI J0937347+293142 2MASS J10475385+2124234 MACS J1149 Lensed Star 1 PSR B0943+10 PSR B0950+08 SDSS J102915+172927...
    8 KB (625 words) - 01:28, 23 August 2024
  • Thumbnail for SDSS J001820.5−093939.2
    Galactic Center. SMSS J031300.36−670839.3, SMSS 0313−6708 SDSS J102915+172927 HD 140283 HE 0107-5240 HE 1327-2326 Cayrel's Star Cutri, Roc M.; Skrutskie...
    12 KB (1,364 words) - 07:14, 10 June 2024
  • (Noquisi) GJ 3685 HVS 7 K2-3 K2-18 2MASSI J0937347+293142 2MASS J10475385+2124234 MACS J1149 Lensed Star 1 PSR B0943+10 PSR B0950+08 SDSS J102915+172927...
    6 KB (411 words) - 16:17, 23 August 2023