86 Aquarii

Last updated
86 Aquarii
Aquarius IAU.svg
Cercle rouge 100%25.svg
Location of 86 Aquarii (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Aquarius
Right ascension 23h 06m 40.84483s [1]
Declination –23° 44′ 35.2344″ [1]
Apparent magnitude  (V)+4.47 [2]
Characteristics
Spectral type G8 III [3]
U−B color index +0.58 [2]
B−V color index +0.90 [2]
Astrometry
Radial velocity (Rv)+15.2 [4]  km/s
Proper motion (μ)RA: +58.86 [1]   mas/yr
Dec.: –1.74 [1]   mas/yr
Parallax (π)15.08 ± 0.72  mas [1]
Distance 220 ± 10  ly
(66 ± 3  pc)
Details
Surface gravity (log g)3.10 [5]   cgs
Temperature 4,900 [5]   K
Metallicity [Fe/H]–0.14 [5]   dex
Other designations
CD–24 17497, HD 218240, HIP 114119, HR 8789, SAO 191651. [6]
Database references
SIMBAD data

86 Aquarii (abbreviated 86 Aqr) is a binary star [7] system in the equatorial constellation of Aquarius. 86 Aquarii is the Flamsteed designation, though it also bears the Bayer designation c1 Aquarii. It is faint but visible to the naked eye with an apparent visual magnitude of +4.47. [2] Based upon parallax measurements, the distance to this star is about 220 light-years (67 parsecs ). [1]

The two components of this system have an angular separation of 0.25  arcseconds. [7] The brighter component is a giant star with a spectral classification of G8 III [3] and an apparent magnitude of 4.79. [7] The effective temperature of its outer atmosphere is 4,900 K, [5] giving it the yellowish glow of a G-type star. [8] The fainter component is a star of magnitude 6.77. [7]

Related Research Articles

<span class="mw-page-title-main">Kappa Aquarii</span> Star in the constellation Aquarius

Kappa Aquarii is a probable binary star in the equatorial constellation of Aquarius. This system is visible to the naked eye, but it is faint at an apparent magnitude of 5.03. Based upon parallax measurements made during the Hipparcos mission, it is around 214 light-years from the Sun.

<span class="mw-page-title-main">Beta Aquarii</span> Double star in the constellation Aquarius

Beta Aquarii is a single yellow supergiant star in the constellation of Aquarius. It has the official name Sadalsuud and the Bayer designation β Aquarii, abbreviated Beta Aqr or β Aqr. Based upon parallax measurements obtained during the Hipparcos mission, this component is located at a distance of approximately 540 light years (165 parsecs) from the Sun. It is drifting further away with a radial velocity of 6.5 km/s. The star serves as an IAU radial velocity standard.

Tau<sup>1</sup> Aquarii Star in the constellation Aquarius

Tau1 Aquarii, Latinized from τ1 Aquarii, is the Bayer designation for a single star in the equatorial constellation of Aquarius. With an apparent visual magnitude of 5.66, it is a faint naked eye that requires dark suburban skies for viewing. Parallax measurements made during the Hipparcos mission yield a distance estimate of roughly 355 light-years from Earth. The star is drifting further away with a radial velocity of +15 km/s. It is a candidate member of the Pisces-Eridanus stellar stream.

<span class="mw-page-title-main">91 Aquarii</span> Triple star system in the constellation Aquarius

91 Aquarii is the Flamsteed designation for a triple star system in the equatorial constellation of Aquarius. It also bears the Bayer designation Psi1 Aquarii. It is visible to the naked eye with an apparent visual magnitude of +4.248. Parallax measurements yield an estimated distance of around 150 light-years from Earth. An extrasolar planet is known to orbit the main star.

Psi<sup>3</sup> Aquarii Binary star in the constellation Aquarius

Psi3 Aquarii, Latinized from ψ3 Aquarii, is the Bayer designation for a visual binary star system in the constellation of Aquarius. It has an apparent visual magnitude of 4.98, which is bright enough to be seen with the naked eye. Parallax measurements give a distance estimate of roughly 262 light-years.

<span class="mw-page-title-main">Mu Aquarii</span> Binary star system in the constellation Aquarius

Mu Aquarii, Latinized from μ Aquarii, is the Bayer designation for a binary star system in the equatorial constellation of Aquarius. It is visible to the naked eye with a combined apparent visual magnitude of 4.7. Based upon parallax measurements, the distance to this system is about 157 light-years. It is drifting closer to the Sun with a radial velocity of −9.1 km/s.

<span class="mw-page-title-main">99 Aquarii</span> Orange-hued giant star in the constellation Aquarius

99 Aquarii is a star in the equatorial constellation of Aquarius. 99 Aquarii is the Flamsteed designation, although it also bears the Bayer designation b2 Aquarii. It is visible to the naked eye with an apparent visual magnitude of 4.38; according to the Bortle Dark-Sky Scale this is bright enough to be seen even from city skies under ideal viewing conditions. Based upon parallax measurements, the distance to this star is around 283 light-years.

<span class="mw-page-title-main">66 Aquarii</span> Star in the constellation Aquarius

66 Aquarii is a single star in the equatorial constellation of Aquarius. 66 Aquarii is the Flamsteed designation though the star also bears the Bayer designation of g1 Aquarii. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.673. Based upon an annual parallax shift of 7.53 milliarcseconds, the distance to this star is about 430 light-years.

<span class="mw-page-title-main">101 Aquarii</span> Star in the constellation Aquarius

101 Aquarii is a star in the equatorial constellation of Aquarius. 101 Aquarii is the Flamsteed designation, although it also bears the Bayer designation b3 Aquarii. The combined apparent visual magnitude of the pair is 4.71, which is bright enough to be seen with the naked eye from the suburbs. The distance of this star from Earth is estimated as 290 light-years based upon parallax measurements.

<span class="mw-page-title-main">89 Aquarii</span> Binary star in the constellation Aquarius

89 Aquarii is a binary star system in the equatorial constellation of Aquarius. 89 Aquarii is the Flamsteed designation, though it also bears the Bayer designation c3 Aquarii. The apparent visual magnitude of +4.69 is bright enough to be seen with the naked eye. Its distance from Earth is roughly 500 light-years (150 pc), based upon parallax measurements with an 11% margin of error.

104 Aquarii (abbreviated 104 Aqr) is a star in the equatorial constellation of Aquarius. 104 Aquarii is the Flamsteed designation, although it also bears the Bayer designation A2 Aquarii. Based on an annual parallax shift of only 3.89 ± 0.25 milliarcseconds, the distance to this star is about 840 light-years (260 parsecs). At that range, the brightness of the star in the V-band is reduced by 0.10 magnitudes as a result of extinction caused by intervening gas and dust.

<span class="mw-page-title-main">25 Aquarii</span> Single, K-type star in the constellation Aquarius

25 Aquarii is a single star in the equatorial constellation of Aquarius. 25 Aquarii is the modern Flamsteed designation; in the past it held the designation 6 Pegasi. It also bears the Bayer designation of d Aquarii. It is located near the border with the modern Pegasus constellation. Although faint at an apparent visual magnitude of +5.09, it is bright enough to be viewed from suburban skies. Based upon an annual parallax shift of 0.01440 arcseconds, it is located at a distance of around 226 light-years from Earth. The visual magnitude of the star is diminished by 0.09 from extinction caused by intervening gas and dust.

97 Aquarii is a binary star system in the equatorial constellation of Aquarius. 97 Aquarii is the Flamsteed designation. The combined apparent visual magnitude of the system is 5.20; the brighter star is magnitude 5.59 while the companion is magnitude 6.72. Based upon an annual parallax shift of 15.30 milliarcseconds, this system is at a distance of around 210 light-years from Earth.

103 Aquarii is a single star in the equatorial constellation of Aquarius. 103 Aquarii is the Flamsteed designation, although it also bears the Bayer designation A1 Aquarii. It is faint but visible to the naked eye as an orange hued star with an apparent visual magnitude of 5.34. Based upon an annual parallax shift of 4.69 mas, the distance to this star is around 700 light-years (210 parsecs). It is moving away from the Earth with a heliocentric radial velocity of +25 km/s.

<span class="mw-page-title-main">83 Aquarii</span> Binary star in the constellation Aquarius

83 Aquarii is a binary star system in the equatorial constellation of Aquarius. The combined apparent visual magnitude of the pair is 5.43, which is faintly visible to the naked eye.

7 Aquarii, abbreviated 7 Aqr, is a binary star system in the zodiac constellation of Aquarius. 7 Aquarii is the Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 5.5; the brighter component is baseline magnitude 5.62 while the faint secondary is magnitude 11.4. As of 2002, the pair had an angular separation of 2.10″ along a position angle of 165°. The distance to this system, based upon an annual parallax shift of 4.9 mas, is around 660 light years. It is moving closer to the Earth with a heliocentric radial velocity of −32 km/s.

12 Aquarii is a triple star system in the zodiac constellation of Aquarius. 12 Aquarii is the Flamsteed designation. It is visible to the naked eye as a dim star with an apparent visual magnitude of 5.67. Parallax measurements by Hipparcos puts it at a distance of some 500 light-years, or 150 parsecs away. The system is moving further from the Earth with a heliocentric radial velocity of +1.1 km/s.

51 Aquarii is a binary star system located around 410 light years away from the Sun in the equatorial constellation of Aquarius. 51 Aquarii is its Flamsteed designation. It is visible to the naked eye as a dim, yellow-white hued star with a combined apparent visual magnitude of 5.78. The system is moving further from the Earth with a heliocentric radial velocity of +6 km/s.

Omega<sup>2</sup> Aquarii Star in the constellation Aquarius

Omega2 Aquarii, Latinised from ω2 Aquarii, is the Bayer designation for a triple star system in the equatorial constellation of Aquarius. It can be seen with the naked eye, having an apparent visual magnitude of 4.49. The approximate distance to this star, 149 light-years, is known from parallax measurements taken during the Hipparcos mission.

40 Aquarii is a star in the equatorial constellation of Aquarius. 40 Aquarii is its Flamsteed designation; it was too faint to be included in the Bright Star Catalogue. The brightness of this star is below the normal limit for visibility with the naked eye, having an apparent visual magnitude of 6.93. Based upon parallax measurements, it is located about 726 light-years away from the Sun. It is moving closer to the Earth with a heliocentric radial velocity of -3 km/s. 40 Aquarii is positioned near the ecliptic and thus is subject to lunar occultations.

References

  1. 1 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600.
  2. 1 2 3 4 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N.
  3. 1 2 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book.....H.
  4. ↑ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
  5. 1 2 3 4 McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi: 10.1086/191527 .
  6. ↑ "86 Aqr -- Star", SIMBAD, Centre de Données astronomiques de Strasbourg , retrieved 2012-07-13.
  7. 1 2 3 4 Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society . 389 (2): 869–879. arXiv: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x . S2CID   14878976.
  8. ↑ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on February 22, 2012, retrieved 2012-01-16
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.