HL Tauri

Not to be confused with HL Tau 76.
HL Tauri
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 04h 31m 38.437s[3]
Declination +18° 13′ 57.65″[3]
Characteristics
Evolutionary stage Pre-main-sequence star
Spectral type Class K9
Apparent magnitude (V) 15.1
B−V color index 0.92
V−R color index 0.89
J−H color index 1.45
J−K color index 3.21
Variable type T Tauri
Astrometry
Proper motion (μ) RA: +8.0±6.0[4] mas/yr
Dec.: -21.8±5.8[4] mas/yr
Distance450[1] ly
(140 pc)
Database references
SIMBADdata

HL Tauri (abbreviated HL Tau) is a young T Tauri star[5] in the constellation Taurus, approximately 450 light-years (140 pc) from Earth[1] in the Taurus Molecular Cloud.[6] The luminosity and effective temperature of HL Tauri imply that its age is less than 100,000 years.[7] At apparent magnitude 15.1,[3] it is too faint to be seen with the unaided eye. It is surrounded by a protoplanetary disk marked by dark bands visible in submillimeter radiation that may indicate a number of planets in the process of formation.[2] It is accompanied by the Herbig–Haro object HH 150, a jet of gas emitted along the rotational axis of the disk that is colliding with nearby interstellar dust and gas.[8]

  1. ^ a b c Cite error: The named reference bbc20141106 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference NRAO was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference kwon2011 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Weintraub1995 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Stephens2014 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Boss1989 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference esa20141106 was invoked but never defined (see the help page).