Eridanus


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Eridanus

(ĭrĭd`ənəs), large southern constellationconstellation,
in common usage, group of stars that appear to form a configuration in the sky; properly speaking, a constellation is a definite region of the sky in which the configuration of stars is contained.
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 stretching SW from Orion for about 60°. Because of its long, winding shape it was identified with a river by many ancient civilizations; e.g., the Egyptians called it the Nile and the Babylonians called it the Euphrates. The brightest star in the constellation, AchernarAchernar
, brightest star in the constellation Eridanus; Bayer designation α Eridani; 1992 position R.A. 1h37.4m, Dec. −57°16'. A bluish-white white star with apparent magnitude 0.51, it is one of the 10 brightest stars in the entire sky.
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, marks the southern end of the river. Eridanus reaches its highest point in the evening sky in December.

Eridanus

(e-rid -ă-nŭs) (River) A long straggling constellation in the southern hemisphere extending from Orion toward the southern polar region. Except for the zero-magnitude Achernar (α), the brightest stars are of 2nd and 3rd magnitude. Zaurak (γ) is a red giant of apparent magnitude 2.95 and spectral type M1 IIIb, while Rana (δ) is somewhat hotter, an orange subgiant of apparent magnitude 3.54 and spectral type K0 IV. To the northwest of Zaurak lies Epsilon (Ɛ) Eridani, a star close to the Sun that may be a planetary system in the making (see Epsilon Eridani). The 3rd-magnitude Acamar (θ) is a fine double star, possibly once much brighter than it is now. Abbrev.: Eri; genitive form: Eridani; approx. position: RA 1.5 to 5h, dec 0° to –58°; area: 1138 sq deg.

Eridanus

 

a constellation of the southern hemisphere; its brightest star, Achernar, has a visual stellar magnitude of 0.5. The constellation is most easily viewed in October and November; it is visible in part from all regions of the USSR. (SeeSTELLAR SKY.)

Eridanus

[‚er·ə′dan·əs]
(astronomy)
A southern constellation made up of a long, crooked line of stars beginning near Rigel in the foot of Orion, and winding west and south to the first-magnitude star Achernar. Abbreviated Eri; Erid. Also known as River Po.
References in periodicals archive ?
5mm Eudiascopic eyepiece, courtesy of Eridanus Optics.
The River Eridanus is a sprawling constellation, and this type of map projection exaggerates or stretches images at the sides.
If you were born between March 1-12, April 10-18, and May 9-15, you were born under the astral zodiac, sign of Eridanus.
The scientists from the University of Minnesota (itself a large void in the US) spotted "nothing" in the region of the constellation Eridanus, near Orion.
Deep-sky objects Designation Object type and constellation Messier 34 Open cluster in Perseus NGC 1232 Galaxy in Eridanus NGC 1261 Globular cluster in Horologium NGC 1291/1269 Galaxy in Eridanus zeta Reticuli Double star in Reticulum Pleiades Open cluster in Taurus NGC 1514 Planetary nebula in Taurus NGC 1535 Planetary nebula in Eridanus Hyades Open cluster in Taurus NGC 1647 Open cluster in Taurus NGC 1807 Open cluster in Taurus Crab Nebula Supernova remnant in Taurus
12] Eridanus Optics CC is one of only three dealers who were licensed to import/ manufacture green laser pointers at the Department of Health on 14 October 2010 and the only one who deals (is involved) in astronomy.
Let us spend some time in the constellation Horologium which lies between Eridanus to its north, Reticulum diagonally east ward, and Hydrus to the south.
Constellations Day Constellation 04 Fornax 07 Perseus 10 Eridanus 19 Reticulum 24 Horologium 30 Caelum 30 Taurus Date of midnight culmination.
The 9th brightest star in the night sky, it marks the southern end of Eridanus (the River), which meanders high overhead, ending at the feet of Orion the Hunter.
Constellations Day Constellation Day Constellation 04 Fornax 24 Horologium 07 Perseus 30 Caelum 10 Eridanus 30 Taurus 19 Reticulum Date of midnight culmination.
Andrie van der Linde of Eridanus Optics also supported the SSP, as did the Soutpansberg Astronomy Club, SAASTA, and the SAAO.
This return was moderately favourable with the comet moving rapidly eastwards, through Aquila (Nov), Aquarius (Dec), Cetus (Jan), Eridanus and Orion (Feb).

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