HD 100546

HD 100546

This image from the NASA/ESA Hubble Space Telescope shows a visible light view of the outer dust around the young star HD 100546, with the newly discovered protoplanet positioned and marked by an orange spot. Artifacts from the brilliant central star dominate the inner part of this picture, which has been digitally subtracted. Black blobs are also artifacts.[1][2]
Observation data
Epoch J2000.0[3]      Equinox J2000.0[3]
Constellation Musca
Right ascension 11h 33m 25.441s[4]
Declination −70° 11′ 41.24″[4]
Apparent magnitude (V) 6.68 – 6.87[5]
Characteristics
Evolutionary stage Herbig Ae/Be star[6]
Spectral type kB8 – A0Vae[7][3]
Apparent magnitude (B) 6.71±0.01[8]
Apparent magnitude (V) 6.30[9]
Apparent magnitude (G) 6.686±0.003[4]
Apparent magnitude (I) 6.64±0.05[1]
Apparent magnitude (J) 6.425±0.020[10]
Apparent magnitude (H) 5.96±0.03[10]
Apparent magnitude (K) 5.418±0.023[10]
Astrometry
Radial velocity (Rv)9.10±1.2[11] km/s
Proper motion (μ) RA: −38.730(46) mas/yr[4]
Dec.: −0.097(39) mas/yr[4]
Parallax (π)9.2494 ± 0.0375 mas[4]
Distance353 ± 1 ly
(108.1 ± 0.4 pc)
Details
Mass2.18+0.02
−0.17[12] M☉
Radius1.5±0.1[13] R☉
Luminosity19.5+7.42
−5.37[a][13] L☉
Surface gravity (log g)–4.0[14][dubious – discuss] cgs
Temperature9,800[14] K
Metallicity [Fe/H]–1.0[7] – –1.4±0.2[15] dex
Age4.8+2.0
−1.1[14] Myr
Other designations
KR Mus, HIP 56379,[3] SAO 251457, CD−69° 893
Database references
SIMBADdata

HD 100546, also known as KR Muscae, is a pre-main sequence star of spectral type B8 to A0 located 353 light-years (108 parsecs) from Earth in the southern constellation of Musca.[4] The star is surrounded by a circumstellar disk from a distance of 0.2 to 4 AU, and again from 13 AU out to a few hundred AU, with evidence for a protoplanet forming at a distance of around 47 AU.[16]

Estimated to be less than 10 million years old, it belongs to Herbig Ae/Be stars, and also the nearest example to the Solar System.[14][17]

  1. ^ a b Cite error: The named reference Ardila2007 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference ESO2013 was invoked but never defined (see the help page).
  3. ^ a b c "HD 100546". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 March 2018.
  4. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  5. ^ "GCVS Query=KR Mus". Sternberg Astronomical Institute. General Catalogue of Variable Stars @ Sternberg Astronomical Institute, Moscow, Russia. Retrieved 2018-09-21.
  6. ^ Cite error: The named reference mulders was invoked but never defined (see the help page).
  7. ^ a b Gray, R. O.; Riggs, Q. S.; Koen, C.; Murphy, S. J.; Newsome, I. M.; Corbally, C. J.; Cheng, K. -P.; Neff, J. E. (2017). "The Discovery of λ Bootis Stars: The Southern Survey I" (PDF). The Astronomical Journal. 154 (1): 31. Bibcode:2017AJ....154...31G. doi:10.3847/1538-3881/aa6d5e.
  8. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355. Bibcode:2000A&A...355L..27H.
  9. ^ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". Vizier Online Data Catalog. 2237. Bibcode:2002yCat.2237....0D.
  10. ^ a b c Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". Vizier Online Data Catalog. Bibcode:2003yCat.2246....0C.
  11. ^ Cite error: The named reference kharchenko was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Casassus2022 was invoked but never defined (see the help page).
  13. ^ a b Fairlamb, J. R.; Oudmaijer, R. D.; Mendigutía, I.; Ilee, J. D.; Van Den Ancker, M. E. (2015). "A spectroscopic survey of Herbig Ae/Be stars with X-shooter – I. Stellar parameters and accretion rates". Monthly Notices of the Royal Astronomical Society. 453: 976–1001. arXiv:1507.05967. doi:10.1093/mnras/stv1576.
  14. ^ a b c d Cite error: The named reference pineda was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Guimaraes was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference quanz13 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Grady2001 was invoked but never defined (see the help page).


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