HD 177693

Last updated
HD 177693
Telescopium constellation map.svg
Red circle.svg
Location of HD 177693 on the map (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 19h 08m 52.32474s [1]
Declination −55° 43′ 13.5297″ [1]
Apparent magnitude  (V)6.45±0.01 [2]
Characteristics
Spectral type K1 III [3] or K1 IV [4]
B−V color index +1.10 [5]
Astrometry
Radial velocity (Rv)−20.9±2.9 [6]  km/s
Proper motion (μ)RA: +56.586  mas/yr [1]
Dec.: −115.876  mas/yr [1]
Parallax (π)8.6669 ± 0.0269  mas [1]
Distance 376 ± 1  ly
(115.4 ± 0.4  pc)
Absolute magnitude  (MV)+1.03 [7]
Details
Mass 1.25 [8]   M☉
Radius 10.6 [9]   R☉
Luminosity 50.2+0.4
−0.3 [1]   L☉
Surface gravity (log g)2.52 [8]   cgs
Temperature 4,750±122 [10]   K
Metallicity [Fe/H]−0.10 [8]   dex
Rotational velocity (v sin i)<1.3 [11]  km/s
Other designations
48 G. Telescopii [6] , CPD−55°9001, GC  26319, HD  177693, HIP  94054, HR  7233, SAO  245937, TIC  230953185 [12]
Database references
SIMBAD data

HD 177693 (HR 7233; 48 G. Telescopii) is a solitary orange-hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.45, [2] placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 376 light-years, [1] and it is drifting closer with a heliocentric radial velocity of −20.9  km/s . [6] At its current distance, HD 177693's brightness is diminished by 0.24 magnitudes due to interstellar extinction [13] and it has an absolute magnitude of +1.03. [7]

HD 177693 has a stellar classification of K1 III, [3] indicating that it is an evolved orange giant. David Stanley Evans gave a less evolved class of K1 IV, [4] instead indicating that it is a slightly evolved subgiant. It has 1.25 times the mass of the Sun [8] but it has expanded to 10.6 times the radius of the Sun. [9] It radiates 50.2 times the luminosity of the Sun [1] from its enlarged photosphere at an effective temperature of 4,750  K . [10] HD 177693 is slightly metal deficient with an iron abundance of [Fe/H] = −0.10 [8] and it spins with a projected rotational velocity lower than 1.3  km/s . [11]

Related Research Articles

<span class="mw-page-title-main">Iota Telescopii</span> K-type giant; Telescopium

ι Telescopii, Latinized as Iota Telescopii and abbreviated Iota Tel, is a solitary star located in the southern constellation Telescopium. It is faintly visible to the naked eye as an orange-hued star with an apparent visual magnitude of +4.88. The star is located roughly 377 light years distant from the Solar System based on Gaia DR3 parallax measurements and it is receding with a radial velocity of 22.3 km/s. At its current distance, Iota Tel's brightness is diminished by 0.19 magnitudes due to interstellar dust and it has an absolute magnitude of −0.39.

<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.

Eta<sup>2</sup> Coronae Australis Star in the constellation Corona Austrlis

Eta2 Coronae Australis, Latinized from η2 Coronae Australis, is a solitary star located in the southern constellation of Corona Australis. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.59. Gaia DR3 parallax measurements imply a distance of 770 light years from the Solar System, but it is drifting closer with a radial velocity of −23 km/s. At its current distance Eta2 CrA's brightness is diminished by 0.27 magnitudes due to stellar extinction from interstellar dust and it has an absolute magnitude of −0.24.

<span class="mw-page-title-main">HD 162337</span> Distant K-type giant; Apus

HD 162337, also known as HR 6646 or rarely 65 G. Apodis, is a solitary orange-hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.35, placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively far at a distance of 989 light-years based on Gaia DR3 parallax measurements, but it is drifting closer with a heliocentric radial velocity of −3.3 km/s. At its current distance, HD 162337's brightness is heavily diminished by 0.45 magnitudes due to interstellar extinction and it has an absolute magnitude of −0.61.

HD 39901 is an orange hued star located in the constellation Columba. It is also called HR 2069, which is the star's Bright Star Catalog designation. Eggen (1989) lists it as a member of the old disk population.

<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 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 210056, also known as HR 8432, is a solitary orange hued star located in the southern circumpolar constellation Octans. Eggen (1993) listed it as a member of the old disk population.

<span class="mw-page-title-main">HD 198716</span> Star in the constellation of Microscopium

HD 198716, also known as HR 7987 or 33 G. Microscopii, is a solitary star located in the southern constellation Microscopium. Eggen (1993) lists it as a member of the Milky Way's old disk population.

<span class="mw-page-title-main">HD 168592</span> Star in the constellation of Corona Australis

HD 168592, also designated as HR 6862 or rarely 7 G. Coronae Australis, is a solitary star located in the southern constellation Corona Australis. It is faintly visible to the naked eye as an orange-hued star with an apparent magnitude of 5.07. Gaia DR3 parallax measurements place it at a distance of 490 light years and is currently receding with a heliocentric radial velocity of 18 km/s. At its current distance, HD 168592's brightness is diminished by 0.38 magnitudes due to interstellar dust. It has an absolute magnitude of −0.76.

<span class="mw-page-title-main">HD 31134</span> Star in the constellation of Camelopardalis

HD 31134, also designated as HR 1561, is a solitary star located in the northern circumpolar constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a white-hued star with an apparent magnitude of 5.74. Gaia DR3 parallax measurements place it 473 light years away. It appears to be approaching the Solar System with a heliocentric radial velocity of −15.1 km/s. At its current distance, HD 31134's brightness is diminished by 0.35 magnitudes due to interstellar dust. It has an absolute magnitude of +0.19.

<span class="mw-page-title-main">HD 101917</span> High proper motion star

HD 101917, also designated as HR 4509, or rarely 34 G. Chamaeleontis, is a solitary star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.38, placing it near the limit for naked eye visibility. The object is located relatively close at a distance of 185 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 33 km/s. At its current distance, HD 101917's brightness is diminished by 0.28 magnitudes due to interstellar dust. It has an absolute magnitude of +2.69.

<span class="mw-page-title-main">HD 182893</span> Star in the constellation Telescopium

HD 182893, also known as HR 7388 or rarely 60 G. Telescopii, is a solitary, yellowish-orange hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.13, making it barely visible to the naked eye even under ideal conditions. Based on Gaia DR3 parallax measurements, the object is estimated to be 328 light years away. However, it is approaching the Solar System with a heliocentric radial velocity of −27 km/s. At its current distance, HD 182893's brightness is diminished by 0.19 magnitudes due to interstellar dust. It has an absolute magnitude of +1.23.

<span class="mw-page-title-main">HD 189080</span> Star in the constellation of Telescopium

HD 189080, also known as HR 7621 or rarely 74 G. Telescopii, is a solitary orange-hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.18, placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements place it at a distance of 357 light years and it is currently receding rapidly with a heliocentric radial velocity of 66.9 km/s. At its current distance, HD 189080's brightness is diminished by 0.17 magnitudes due to extinction from interstellar dust. It has an absolute magnitude of +1.1.

<span class="mw-page-title-main">HD 170873</span> K-type giant; Telescopium

HD 170873, also known as HR 6954 or rarely 19 G. Telescopii, is a solitary orange-hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.20, placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements imply a distance of 551 light years and it is currently receding with a heliocentric radial velocity of 23.8 km/s. At its current distance, HD 170873's brightness is diminished by 0.39 magnitudes due to interstellar dust, and it has an absolute magnitude of −0.31.

<span class="mw-page-title-main">HD 187420/187421</span> Binary star in the constellation Telescopium

HD 187420 and HD 187421, are the components of a binary star located in the southern constellation Telescopium. Gaia DR3 parallax measurements place the stars at a distance of 407 and 414 light years respectively. The two are separated by 23″, and they are approaching the Solar System with heliocentric radial velocities of −17.9 km/s and −21.5 km/s respectively.

<span class="mw-page-title-main">HD 185075</span> Star in the constellation Telescopium

HD 185075, also known as HR 7459 or rarely 65 G. Telescopii, is a solitary star located in the southern constellation Telescopium. It has an apparent magnitude of 6.26, placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 422 light years and it is currently receding with a heliocentric radial velocity of 14.8 km/s. At its current distance, HD 185075's brightness is diminished by 0.23 magnitudes due to interstellar dust and it has an absolute magnitude of +0.92.

<span class="mw-page-title-main">HD 170521</span> Distant K-type giant; Corona Australis

HD 170521, also known as HR 6937 or rarely 12 G. Coronae Australis, is a solitary star located in the southern constellation Corona Australis. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.69. The object is located relatively far at a distance of approximately 1,500 light years based on Gaia DR3 parallax measurements, and it is receding with a heliocentric radial velocity of 7.2 km/s. At its current distance, HD 170521's brightness is heavily diminished by 0.46 magnitudes due to extinction from interstellar dust and it has an absolute magnitude of −1.90.

<span class="mw-page-title-main">HD 179433</span> G-type giant; Corona Australis

HD 179433, also known as HR 7281 or rarely 49 G. Coronae Australis, is a solitary star located in the southern constellation Corona Australis. It is faintly visible to the naked eye as a yellow-hued point of light with an apparent magnitude of 5.91. Gaia DR3 parallax measurements imply a distance of 329 light-years, and it is currently drifting closer with a heliocentric radial velocity of −35.1 km/s. At its current distance, HD 179433's brightness is diminished by interstellar extinction of 0.22 magnitudes and it has an absolute magnitude of +1.11.

HD 181295 is a star located in the southern constellation Telescopium. It has an apparent magnitude of 6.42, placing it near the limit of naked eye visibility, even under ideal conditions. The object is located relatively close at a distance of approximately 252 light-years based on Gaia DR3 parallax measurements, and it is currently drifting closer with a heliocentric radial velocity of −35.7 km/s. At its current distance, HD 181295's brightness is diminished by 0.22 magnitudes due to interstellar extinction and it has an absolute magnitude +2.14.

References

  1. 1 2 3 4 5 6 7 8 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID   244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361. S2CID   17128864.
  3. 1 2 Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars: Declinations −90° to −53°. Vol. 1. Bibcode:1975mcts.book.....H.
  4. 1 2 Evans, D. S. (1966). "Fundamental data for Southern stars (6th list)". Royal Greenwich Observatory Bulletins. 110: 185. Bibcode:1966RGOB..110..185E.
  5. ↑ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  6. 1 2 3 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. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
  7. 1 2 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN   1562-6873. ISSN   1063-7737. S2CID   119257644.
  8. 1 2 3 4 5 Anders, F.; et al. (February 2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv: 2111.01860 . Bibcode:2022A&A...658A..91A. doi: 10.1051/0004-6361/202142369 . eISSN   1432-0746. ISSN   0004-6361.
  9. 1 2 McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv: 1706.02208 . Bibcode:2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433 . eISSN   1365-2966. ISSN   0035-8711. S2CID   73594365.
  10. 1 2 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . eISSN   1538-3881. hdl: 1721.1/124721 . S2CID   166227927.
  11. 1 2 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars V: Southern stars *". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474 . Bibcode:2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762 . eISSN   1432-0746. ISSN   0004-6361. S2CID   54046583.
  12. ↑ "HD 177693". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved September 11, 2023.
  13. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160 . Bibcode:2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219 . eISSN   1365-2966. ISSN   0035-8711. S2CID   118879856.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.