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

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

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

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

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

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

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

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<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

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