Net (constellation)
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Constellation network |
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| Latin name | Reticulum |
| Latin genitive | Reticuli |
| Abbreviation | Ret |
| Right ascension | 03 h 13 m 27 s to 04 h 37 m 06 s |
| declination | −67 ° 14 ′ 53 ″ to −52 ° 44 ′ 49 ″ |
| surface | 113.936 deg² rank 82 |
| Completely visible | 23.1 ° N to 90 ° S |
| Observation time for Central Europe | not observable |
| Number of stars brighter than 3 mag | 0 |
| Brightest star (size) | α reticuli (3.33) |
| Meteor streams |
no |
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Neighboring constellations ( clockwise from north ) |
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| swell | IAU , |
 The reticulum constellation, the network as it can be seen with the naked eye |
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The network ( Latin / technical language reticulum - small network ) is a constellation of the southern sky.
description
The web is a small but prominent constellation north of the Large Magellanic Cloud (LMC). Four stars form a diamond .
history
The constellation was originally called "Rhombus" and was introduced in 1624 by the Silesian cartographer Jacob Bartsch .
In 1752 the French astronomer Nicolas Louis de Lacaille renamed it “Reticulum Rhomboidalis” (rhombic network). It is not a network in the conventional sense, but an astronomical measuring instrument: a glass plate with a network pattern of engraved lines that could be inserted in front of an eyepiece (e.g. a crosshair ). It is one of the constellations that Lacaille named after technical equipment.
Celestial objects
Stars
| B. | F. | Names or other designations | size | Lj | Spectral class |
|---|---|---|---|---|---|
| α | 3.33 m | 163 | G7 III | ||
| β | 3.84 m | 100 | K0 IV | ||
| ε | 4.44 m | 59 | K2 IV | ||
| γ | 4.48 m | 491 | M4 III | ||
| δ | 4.56 m | 530 | M2 III | ||
| κ | 4.71 | 70 | F5 IV-V | ||
| ι | 4.97 | 331 | K4 III | ||
| ζ 2 | 5.24 | 39 | G1 V | ||
| η | 5.24 | 380 | G7 III | ||
| HR 1340 | 5.45 | 267 | K0 III |
β Reticuli is a 100 light-years distant, orange star of the spectral class K0 IV.
Double stars
| object | Sizes | distance |
|---|---|---|
| α | 3.33 / 12 m | |
| ζ | 5.24 / 5.54 m | 310 " |
α Reticuli is a binary star system 163 light years away . The main star, shining yellow, is 20 times the diameter and 100 times the luminosity of our sun . It has a faint companion of the 12th magnitude at a distance of 2450 AU , which orbits it in 60,000 years.
ζ Reticuli is a binary star system 39 light years away. Due to the large angular distance of 310 " arc seconds , both stars are visible to the naked eye.
NGC objects
| NGC | other | size | Type | Surname |
|---|---|---|---|---|
| 1313 | 8.7 m | Galaxy |
