HD 34989

Last updated
HD 34989
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Orion
Right ascension 05h 21m 43.5619s [1]
Declination +08° 25′ 42.841″ [1]
Apparent magnitude  (V)5.80 [2]
Characteristics
Spectral type B1V [3]
U−B color index −0.88 [2]
B−V color index −0.13 [2]
Astrometry
Radial velocity (Rv)25.30±3.5 [4]  km/s
Proper motion (μ)RA: −0.438±0.227 [1]   mas/yr
Dec.: −4.493±0.184 [1]   mas/yr
Parallax (π)1.8706 ± 0.1413  mas [1]
Distance 1,700 ± 100  ly
(530 ± 40  pc)
Absolute magnitude  (MV)−2.36 [5]
Details
Mass 12.1±0.1 [6]   M☉
Luminosity 1,508 [5]   L☉
Surface gravity (log g)4.194±0.044 [7]   cgs
Temperature 24,838±450 [7]   K
Metallicity [Fe/H]−0.43 [8]   dex
Age 8.0±2.0 [6]   Myr
Other designations
HIP 25041, HD 34989, PMC 90-93 1242, uvby98 100034989, AG +08 591, HIC 25041, PPM 148818, VDB 38, ALS 8286, HR 1763, ROT 774, WH 21, BD +08 933, IRAS 05190+0822, SAO 112667, YZ 8 2140, FK5 2401, JP11 1038, [KSP2003] G194.6241-15.6072, GC 6574, LS VI +08 1, TD1 4461, [KSP2003] J052143.58+082543.0, GCRV 3206, 2MASS J05214355+0825425, TYC 700-1015-1, [M26] 1, MCW 299, UBV 5096, [SC93b] 146, GSC 00700-01015, N30 1147, UBV M 10870
Database references
SIMBAD data

HD 34989 is a blue-white star in the main sequence, of apparent magnitude 5.80, [2] in the constellation of Orion. It is 1700 light-years from the Solar System.

Contents

HD 34989 The Raspberry Nebula in Orion (SH2-263).jpg
HD 34989

Observation

The star is in the northern celestial hemisphere, but close to the celestial equator; this means that it can be observed from all the inhabited regions of the Earth without difficulty and that it is not visible only in the innermost areas of Antarctica. It appears as circumpolar only far beyond the Arctic polar circle. Its brightness puts it at the limit of visibility to the naked eye, so to be observed without the aid of devices requires a clear, and preferably moonless, sky.

The best period for observation in the evening sky is between late October and April from both hemispheres; in February (as at J2000) it is anti-posed from the Sun. In July and August its direction is close to that of the Sun, therefore coinciding with most hours of daylight.

Physical characteristics

It is a blue-white star of the main sequence, having an absolute magnitude of -0.99 and its positive radial velocity [4] indicates that the star is moving away from the Solar System.

The star appears wrapped in an extensive nebulosity that partly shines by reflection and partly by emission. The reflection nebula is listed as GN 05.19.0 [9] and the HII region is called Sh2-263. HD 34989 is the ionizing source of this HII-region. In observations with carbon monoxide this corresponds to a circular hole. [10]

The star has a size of about 0.118 ± 0.026 milliarcseconds, based on SED fitting. [11]

Related Research Articles

HD 63454, formally named Ceibo, is a star located in the southern circumpolar constellation Chamaeleon near the border with Mensa. To see the star, one needs a small telescope because it has an apparent magnitude of 9.36, which is below the limit for naked eye visibility. The object is located relatively close at a distance of 123 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 33.8 km/s. At its current distance, HD 63454's brightness is diminished by two tenths of a magnitude due to interstellar dust. It has an absolute magnitude of +6.68.

<span class="mw-page-title-main">Omega Cassiopeiae</span> Binary star system in constellation Cassiopeia

Omega Cassiopeiae is a binary star system in the northern constellation of Cassiopeia. It has a combined apparent visual magnitude of +4.99, which means it is a faint star but visible to the naked eye. Based upon an annual parallax shift of 4.65 mas as seen from Earth, this system is located roughly 730 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction of 0.16 due to interstellar dust.

<span class="mw-page-title-main">HD 24479</span> Star in the constellation Camelopardalis

HD 24479, also designated as HR 1204, is a solitary, bluish-white hued star located in the northern circumpolar constellation Camelopardalis. The star is visible to the naked eye with an apparent visual magnitude of 5.04. Based on Gaia DR3 parallax measurements, it is located 385 light years from the Sun. However, it is receding with a somewhat constrained heliocentric radial velocity of 4.6 km/s. At its current distance, HD 24479's brightness is diminished by 0.29 magnitudes due to interstellar dust.

HD 101570 is a single star in the southern constellation of Centaurus. It has a yellow hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.93. The star is located at a distance of approximately 1,080 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +18 km/s. It has an absolute magnitude of −2.24.

HD 3322 is a binary star system in the northern constellation of Andromeda. With an apparent visual magnitude of 6.51, it lies below the nominal brightness limit for visibility with the normal naked eye, but it is still possible to see the star with excellent vision under ideal seeing conditions. An annual parallax shift of 4.59±0.65 mas provides a distance estimate of roughly 700 light years.

<span class="mw-page-title-main">HD 90132</span> Solitary White-hued star and high proper motion star

HD 90132 is a solitary white hued star located in the southern constellation Antlia. It has an apparent magnitude of 5.33, making it one of the brighter members of this generally faint constellation. The star is relatively close at a distance of 135 light years but is receding with a heliocentric radial velocity of 17 km/s.

HD 72337, also known as HR 3370, is a solitary, bluish-white hued star located in the southern constellation Volans. With an apparent magnitude of 5.51, it is faintly visible to the unaided eye but only under ideal conditions.

<span class="mw-page-title-main">HD 26764</span> Star in the constellation Camelopardalis

HD 26764, also known as HR 1314 or rarely 14 H. Camelopardalis, is a solitary white hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.19, making it faintly to the naked eye if viewed under good conditions. Gaia DR3 parallax measurements place the object at a distance of 266 light years and is drifting closer with a poorly constrained heliocentric radial velocity of 3 km/s. At its current distance, HD 26764's brightness is diminished by 0.26 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 27022</span> Star in the constellation Camelopardalis

HD 27022, also known as HR 1327, is a star located in the northern circumpolar constellation Camelopardalis. The object has also been designated as 20 H. Camelopardalis, but is not commonly used in modern times. It has an apparent magnitude of 5.27, allowing it to be faintly visible to the naked eye. Based on parallax measurements from Gaia DR3, the star has been estimated to be 347 light years away. It appears to be approaching the Solar System, having a heliocentric radial velocity of −19.5 km/s.

<span class="mw-page-title-main">HD 76236</span> Star in the constellation Chamaeleon

HD 76236, also designated as HR 3543 or rarely 11 G. Chamaeleontis, is a solitary star located in the southern circumpolar constellation Chamaeleon. It is faintly visible to the naked eye as an orange-hued star with an apparent magnitude of 5.77. Based on parallax measurements from the Gaia satellite, the object is estimated to be 612 light years away. Currently, it is receding with a heliocentric radial velocity of 7 km/s. At its current distance, HD 76236's brightness is diminished by 0.39 magnitudes due to interstellar dust. It has an absolute magnitude of −0.13.

HD 64307, also known as HR 3075, is a solitary, orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.35, allowing it to be faintly seen with the naked eye. Based on parallax measurements from the Gaia spacecraft, The object is estimated to be 690 light years distant. It appears to be receding from the Sun, having a heliocentric radial velocity of 34 km/s.

HD 194012 is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.15, making it visible to the naked eye under ideal conditions. The star is relatively close at a distance of only 85 light years but is receding with a heliocentric radial velocity of 4.5 km/s.

HD 194953 is a solitary star in the equatorial constellation Delphinus. It is faintly visible to the naked eye with an apparent magnitude of 6.19 and is located 414 light years away. However, it is approaching the Solar System with a heliocentric radial velocity of −28 km/s.

HD 193373 is a solitary red hued star located in the equatorial constellation Delphinus. It has an apparent magnitude of 6.21, placing it near the limit for naked eye visibility. Parallax measurements place it 846 light years distant and it is currently receding with a heliocentric radial velocity of 22.7 km/s.

HD 58425, also known as HR 2830, is an astrometric binary located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orang point of light at an apparent magnitude of 5.64. Based on parallax measurements from Gaia DR3, the system is estimated to be 470 light years away from Earth. It appears to be rapidly receding from the Sun, having a heliocentric radial velocity of 58.6 km/s. HD 58425 is listed as 54 Ursae Majoris in Johann Hevelius' catalogue, but this was dropped after the official IAU's official constellation borders were drawn.

HD 34255, also known HR 1720, is a star located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.60, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of about 1.65 kly but is approaching the Solar System with a heliocentric radial velocity of −7.7 km/s.

HD 26670, also known as HR 1305, is a star located in the northern circumpolar constellation of Camelopardalis, the giraffe. The object has been designated as 26 H. Camelopardalis, but is not commonly used in modern times. It has an apparent magnitude of 5.70, allowing it to be faintly visible to the naked eye. Based on parallax measurements from Gaia DR3, the object is estimated to be 491 light years away from the Solar System. It appears to be slowly receding with a heliocentric radial velocity of 0.4 km/s.

<span class="mw-page-title-main">HD 106248</span> Star in the constellation Chamaeleon

HD 106248, also known as HR 4649, is a solitary, orange hued star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.34, placing it near the limit for naked eye visibility. Based on parallax measurements from Gaia DR3, the object is estimated to be 358 light years away from the Solar System. It appears to be receding with a heliocentric radial velocity of 34.5 km/s. At its current distance, HD 106248's brightness is diminished by 0.32 due to interstellar dust and Eggen (1993) lists it as a member of the old (thick) disk population.

<span class="mw-page-title-main">HD 170642</span> A-type dwarf; Corona Australis

HD 170642, also designated as HR 6942 or rarely 13 G. Coronae Australis, is a single star located in the southern constellation Corona Australis. It is faintly visible to the naked eye as a white hued star with an apparent magnitude of 5.16. The object is located relatively close at a distance of 229 light years based on Hipparcos parallax measurements, but it is approaching the Solar System with a somewhat constrained heliocentric radial velocity of −6 km/s. At its current distance, HD 170642's brightness is diminished by 0.28 magnitudes due to interstellar dust. It has an absolute magnitude of +0.93.

<span class="mw-page-title-main">HD 10390</span> B-type main-sequence star; Triangulum

HD 10390 is a solitary star located in the northern constellation Triangulum. It is faintly visible to the naked eye as a bluish-white hued point of light with an apparent magnitude of 5.64. The object is located relatively close at a distance of 292 light-years based on Gaia DR3 parallax measurements and it is drifting closer with a heliocentric radial velocity of −1.9 km/s. At its current distance, HD 10390's brightness is diminished by an interstellar extinction of only five-hundredths of a magnitude and it has an absolute magnitude of +1.00.

References

  1. 1 2 3 4 5 Gaia Collaboration (2018-08-01). "Gaia Data Release 2 - Summary of the contents and survey properties". Astronomy & Astrophysics. 616: A1. arXiv: 1804.09365 . Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. ISSN   0004-6361. S2CID   49211658.
  2. 1 2 3 4 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". YCat. Bibcode:2002yCat.2237....0D.
  3. ↑ Sharpless, Stewart (September 1952). "A Study of the Orion Aggregate of Early-Type Stars". Astrophysical Journal. 116: 251. Bibcode:1952ApJ...116..251S. doi:10.1086/145610. ISSN   0004-637X.
  4. 1 2 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN   1063-7737. S2CID   119231169.
  5. 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID   119257644.
  6. 1 2 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011-01-01). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv: 1007.4883 . Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. ISSN   0035-8711. S2CID   118629873.
  7. 1 2 Huang, Wenjin; Gies, D. R.; McSwain, M. V. (October 2010). "A Stellar Rotation Census of B Stars: From ZAMS to TAMS". Astrophysical Journal. 722 (1): 605–619. arXiv: 1008.1761 . Bibcode:2010ApJ...722..605H. doi:10.1088/0004-637X/722/1/605. ISSN   0004-637X. S2CID   118532653.
  8. ↑ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy and Astrophysics. 591: A118. arXiv: 1605.07384 . Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. S2CID   119258214.
  9. ↑ Magakian, T. Yu (February 2003). "Merged catalogue of reflection nebulae". Astronomy & Astrophysics. 399: 141–145. Bibcode:2003A&A...399..141M. doi: 10.1051/0004-6361:20021743 . ISSN   0004-6361.
  10. ↑ Lang, W. J.; Masheder, M. R. W.; Dame, T. M.; Thaddeus, P. (May 2000). "The lambda -Orionis Ring in CO". Astronomy & Astrophysics. 357: 1001–1012. Bibcode:2000A&A...357.1001L. ISSN   0004-6361.
  11. ↑ Swihart, Samuel J.; Garcia, E. Victor; Stassun, Keivan G.; Belle, Gerard van; Mutterspaugh, Matthew W.; Elias, Nicholas (December 2016). "A Catalog of Calibrator Stars for Next-Generation Optical Interferometers". The Astronomical Journal. 153 (1): 16. arXiv: 1610.04600 . doi: 10.3847/1538-3881/153/1/16 . ISSN   1538-3881. S2CID   118733649.
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