Nu Sagittarii

The Bayer designation Nu Sagittarii (ν Sgr, ν Sagittarii) is shared by two star systems, ν¹ Sagittarii and ν² Sagittarii, in the constellation Sagittarius. The two stars are separated by 0.23° in the sky. Nu Sagittarii also has the traditional name Ain al Rami, from the Arabic عين الرامي ^cain ar-rāmī meaning eye of the archer^[1].

Nu Sagittarii is often cited as one of the earliest identified double stars. In the Almagest, Ptolemy describes the star as "nebulous and double", referring to the double nature of the star, as well as the nearby globular cluster NGC 6717.^{[citation needed][clarification needed]}

ν¹ Sagittarii

ν¹ Sagittarii

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Sagittarius
Right ascension	18h 54m 10.2s
Declination	-22° 44' 42"
Apparent magnitude (V)	+4.86
Distance	1850 ± 900 ly (570 ± 270 pc)
Spectral type	K2I+B9V:
Other designations
32 Sagittarii, HR 7116, HD 174974, SAO 187426, HIP 92761, ADS 11794, CCDM 18542-2245

Nu-1 Sagittarii is a triple star system lying approximately 1850 light years from Earth. The primary component, Nu-1 Sagittarii A, is a spectral type K1 bright giant which has an apparent magnitude of +4.86. It is orbited by two magnitude +10.8 companions: Nu-1 Sagittarii B at a distance of 2.5 arcseconds from the primary, and Nu-1 Sagittarii C at a distance of 28.2 arcseconds.

ν² Sagittarii

ν² Sagittarii

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Sagittarius
Right ascension	18h 55m 07.1s
Declination	-22° 40' 17"
Apparent magnitude (V)	+5.00
Distance	270 ± 21 ly (83 ± 6 pc)
Spectral type	K1Ib/II
Other designations
35 Sagittarii, HR 7120, HD 175190, SAO 187445, HIP 92845

Nu-2 Sagittarii A is a spectral type K1 supergiant which has an apparent magnitude of +5.00. It is approximately 270 light years from Earth.

References

• On-Line copy of the Almagest's star catalog

1. ^ Star Name - R.H. Allen p. 359

This binary or multiple star system-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Bayer objects Triple star systems Sagittarius constellation K-type bright giants K-type supergiants Multiple star stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем написать реферат Rodrigo Gimeno Münster School of Business Administration and Economics Look at other dictionaries: Sagittarii — Saltar a navegación, búsqueda Sagittarii (en singular, sagittarius) era el nombre que recibían en la Antigua Roma los arqueros que formaban parte de las tropas auxiliares. Presumiblemente, y hasta épocas muy tardías, la mayor parte de los… …   Wikipedia Español SAGITTARII Venatores — ordo militum, in Notit. Imp. Vide supra, Acceptoria …   Hofmann J. Lexicon universale Sagittarii — For the constellation, see Sagittarius. Sagittarii were auxiliary archers. Despite the longstanding contacts with, and several defeats by, Parthians and other Eastern nations for whom horse archery was tactically important, there is no definite… …   Wikipedia Sagittarii — sekretoriniai paukščiai statusas T sritis zoologija | vardynas atitikmenys: lot. Sagittarii ryšiai: platesnis terminas – plėšrieji paukščiai siauresnis terminas – sekretoriniai …   Paukščių pavadinimų žodynas Sagittarii — Sag·it·ta·ri·us || ‚sædʒɪ teÉ™rɪəs n. the Archer, stellar constellation represented by a centaur shooting an arrow; ninth sign of the zodiac …   English contemporary dictionary Chi Sagittarii — The Bayer designation Chi Sagittarii (χ Sgr, χ Sagittarii) is shared by three star systems in the constellation Sagittarius. The brightest of these, χ¹ Sagittarii and χ³ Sagittarii, are separated by 0.56° on the sky. The dimmer χ² Sagittarii is… …   Wikipedia Kappa Sagittarii — The Bayer designation Kappa Sagittarii (κ Sgr / κ Sagittarii) is shared by two star systems, κ¹ Sagittarii and κ² Sagittarii, in the constellation Sagittarius. The two star systems are separated by 0.46° on the sky.κ¹ SagittariiStarbox short name …   Wikipedia Gamma Sagittarii — La désignation de Bayer Gamma Sagittarii (γ Sgr / γ Sagittarii) est partagée par deux systèmes d étoiles de la constellation du Sagittaire, γ1 Sagittarii et γ2 Sagittarii. Ils sont distants de 0,86° sur le fond du ciel et peuvent être séparés à l …   Wikipédia en Français Xi2 Sagittarii — Xi Sagittarii ξ¹ Sagittarii Données d observation (Époque J2000.0) Ascension droite 18h 57m 20.5s Déclinaison 20° 39′ 2″ Constellation Sagittaire Magnitude apparente …   Wikipédia en Français Theta Sagittarii — Starbox short name=θ¹ Sagittarii epoch=J2000.0 constell=Sagittarius ra=19h 59m 44.2s dec= 35° 16 35 spectral=B2.5IV appmag v=+4.37 dist ly=618 ± 105 dist pc=189 ± 32 names=HR 7623, HD 189103, SAO 211716, HIP 98412The Bayer designation Theta… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”