A-Z of astronomical objects (Stars, planets, galaxies etc.)

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Vindemiatrix
– ε Virginis
– Sp. type G8 III (yellow giant star)
– Parallax 30 mas

Weywot
- Small moon of TNO Quaoar
- About 74 km in diameter
- Orbits at at distance of 14.500 km from Quaoar

Xiwanggongcheng (7494 Xiwanggongcheng)
– Main-belt asteroid (1995 UV48)
– Period 5.26 yr
– Ecc. of orbit e = 0.0516, semi-major axis of orbit a = 3.023 AU

Ymir
- Small Saturn moon, only 18 km in diameter
- retrograde obit around Saturn, takes 3.6 years to complete
- very low albedo, like fresh asphalt: 0.06

Zubeneschamali
– β Librae
– Sp. type B8 V (main-sequence star)
– Parallax 17.62 mas

Andromeda Galaxy (M31)
- contains about 1 trillion stars
- Easily visible with the naked eye (apparent magnitude: 3.44)
- Only observed supernova so far in M31 is SN1885A, which reached an
apparent magnitude of only 6.

Black Eye Galaxy
– M64, NGC 4826
– Spiral galaxy, morphological type (R)SA(rs)ab
– So named because it closely resembles a black eye

Christmas Tree Cluster
– NGC 2264
– Open cluster of stars, so named because of its close resemblance to the Christmas tree
– Includes the dark Cone Nebula

Denebola
- Second brightest star in the constellation of Leo
- High rotational velocity of about 128 km/s
- spectral type A3V

Erakis
– μ Cephei, also known as Herschel's Garnet Star
– Sp. type M1 I (red supergiant star)
– One of the largest and most luminous stars in our galaxy

(Note. The proper name Erakis may also refer to μ Draconis which was previously called Ar-Rāqis.)

Fornjot
- The outermost moon of Saturn, discovered in 2005
- Orbits Saturn at a distance of about 24 milion km.
- About 6 km i diameter

Groombridge 1830
– HR 4550, but still known by its archaic catalog number
– Third highest proper motion of all stars
– Sp. type G8 V (sun-like yellow dwarf)

Horsehead Nebula
Nebula
Dark Nebula
Located in Orion

Ida (243 Ida)
- Main belt asteorid, size about 54x24x15 km.
- Belongs to the Koronis asteroid family.
- Studied by spacecraft Galileo in 1993 on its way to Jupiter.

Juxta Crucem
– ε Crucis
– Sp. type K3 III (red giant)
– Parallax 14.30 mas