88 modern constellations by area - Simple English Wikipedia, the free encyclopedia
The International Astronomical Union (IAU) names 88 constellations of stars. In the table below, they are ranked by the solid angle that they subtend in the sky, measured in square degrees and millisteradians.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/86/Hydra_constellation_map.svg/250px-Hydra_constellation_map.svg.png)
These solid angles depend on borders between the constellations: the list below is based on constellation borders drawn up by Eugène Delporte in 1930 for the IAU and published in Délimitation scientifique des constellations (Cambridge University Press). Before Delporte's work, there was no standard list of the borders of each constellation.
Delporte drew the borders along vertical and horizontal lines of right ascension and declination; however, he did so for the epoch B1875.0, which means that due to precession of the equinoxes, the borders on a modern star map (e.g., for epoch J2000) are already somewhat distorted and no longer perfectly vertical or horizontal. This distortion will increase over the centuries to come. However, this does not change the solid angle of any constellation.
Rank | Abbrev. | Constellation | Solid angle ("Area") (sq. deg.) [1] | Solid angle (millisteradians) | Percentage | Right ascension (hours & mins) [2] | Declination (degs & mins) [3] | Quad [4] |
---|---|---|---|---|---|---|---|---|
01 | Hya | Hydra | 1302.844 | 396.869 | 3.16% | +11 36.73 | −14 31.91 | SQ2 |
02 | Vir | Virgo | 1294.428 | 394.305 | 3.14% | +13 24.39 | −04 09.51 | SQ3 |
03 | UMa | Ursa Major | 1279.660 | 389.807 | 3.10% | +11 18.76 | +50 43.27 | NQ2 |
04 | Cet | Cetus | 1231.411 | 375.109 | 2.99% | +01 40.10 | −07 10.76 | SQ1 |
05 | Her | Hercules | 1225.148 | 373.201 | 2.97% | +17 23.16 | +27 29.93 | NQ3 |
06 | Eri | Eridanus | 1137.919 | 346.630 | 2.76% | +03 18.02 | −28 45.37 | SQ1 |
07 | Peg | Pegasus | 1120.794 | 341.413 | 2.72% | +22 41.84 | +19 27.98 | NQ4 |
08 | Dra | Draco | 1082.952 | 329.886 | 2.63% | +15 08.64 | +67 00.40 | NQ3 |
09 | Cen | Centaurus | 1060.422 | 323.023 | 2.57% | +13 04.27 | −47 20.72 | SQ3 |
10 | Aqr | Aquarius | 979.854 | 298.481 | 2.38% | +22 17.38 | −10 47.35 | SQ4 |
11 | Oph | Ophiuchus | 948.340 | 288.881 | 2.30% | +17 23.69 | −07 54.74 | SQ3 |
12 | Leo | Leo | 946.964 | 288.462 | 2.30% | +10 40.03 | +13 08.32 | NQ2 |
13 | Boo | Boötes | 906.831 | 276.237 | 2.20% | +14 42.64 | +31 12.16 | NQ3 |
14 | Psc | Pisces | 889.417 | 270.932 | 2.16% | +00 28.97 | +13 41.23 | NQ1 |
15 | Sgr | Sagittarius | 867.432 | 264.235 | 2.10% | +19 05.94 | −28 28.61 | SQ4 |
16 | Cyg | Cygnus | 803.983 | 244.907 | 1.95% | +20 35.28 | +44 32.70 | NQ4 |
17 | Tau | Taurus | 797.249 | 242.856 | 1.93% | +04 42.13 | +14 52.63 | NQ1 |
18 | Cam | Camelopardalis | 756.828 | 230.543 | 1.83% | +08 51.37 | +69 22.89 | NQ2 |
19 | And | Andromeda | 722.278 | 220.018 | 1.75% | +00 48.46 | +37 25.91 | NQ1 |
20 | Pup | Puppis | 673.434 | 205.140 | 1.63% | +07 15.48 | −31 10.64 | SQ2 |
21 | Aur | Auriga | 657.438 | 200.267 | 1.59% | +06 04.42 | +42 01.68 | NQ2 |
22 | Aql | Aquila | 652.473 | 198.755 | 1.58% | +19 40.02 | +03 24.65 | NQ4 |
23 | Ser | Serpens[5] | 636.928 | 194.019 | 1.54% | +16 57.04 | +06 07.32 | NQ3 |
24 | Per | Perseus | 614.997 | 187.339 | 1.49% | +03 10.50 | +45 00.79 | NQ1 |
25 | Cas | Cassiopeia | 598.407 | 182.285 | 1.45% | +01 19.16 | +62 11.04 | NQ1 |
26 | Ori | Orion | 594.120 | 180.979 | 1.44% | +05 34.59 | +05 56.94 | NQ1 |
27 | Cep | Cepheus | 587.787 | 179.050 | 1.42% | +02 32.64 | +71 00.51 | NQ4 |
28 | Lyn | Lynx | 545.386 | 166.134 | 1.32% | +07 59.53 | +47 28.00 | NQ2 |
29 | Lib | Libra | 538.052 | 163.900 | 1.30% | +15 11.96 | −15 14.08 | SQ3 |
30 | Gem | Gemini | 513.761 | 156.501 | 1.25% | +07 04.24 | +22 36.01 | NQ2 |
31 | Cnc | Cancer | 505.872 | 154.097 | 1.23% | +08 38.96 | +19 48.35 | NQ2 |
32 | Vel | Vela | 499.649 | 152.202 | 1.21% | +09 34.64 | −47 10.03 | SQ2 |
33 | Sco | Scorpius | 496.783 | 151.329 | 1.20% | +16 53.24 | −27 01.89 | SQ3 |
34 | Car | Carina | 494.184 | 150.537 | 1.20% | +08 41.70 | −63 13.16 | SQ2 |
35 | Mon | Monoceros | 481.569 | 146.694 | 1.17% | +07 03.63 | +00 16.93 | NQ2 |
36 | Scl | Sculptor | 474.764 | 144.621 | 1.15% | +00 26.28 | −32 05.30 | SQ1 |
37 | Phe | Phoenix | 469.319 | 142.963 | 1.14% | +00 55.91 | −48 34.84 | SQ1 |
38 | CVn | Canes Venatici | 465.194 | 141.706 | 1.13% | +13 06.96 | +40 06.11 | NQ3 |
39 | Ari | Aries | 441.395 | 134.457 | 1.07% | +02 38.16 | +20 47.54 | NQ1 |
40 | Cap | Capricornus | 413.947 | 126.095 | 1.00% | +21 02.93 | −18 01.39 | SQ4 |
41 | For | Fornax | 397.502 | 121.086 | 0.96% | +02 47.88 | −31 38.07 | SQ1 |
42 | Com | Coma Berenices | 386.475 | 117.727 | 0.94% | +12 47.27 | +23 18.34 | NQ3 |
43 | CMa | Canis Major | 380.118 | 115.791 | 0.92% | +06 49.74 | −22 08.42 | SQ2 |
44 | Pav | Pavo | 377.666 | 115.044 | 0.92% | +19 36.71 | −65 46.89 | SQ4 |
45 | Gru | Grus | 365.513 | 111.342 | 0.89% | +22 27.39 | −46 21.11 | SQ4 |
46 | Lup | Lupus | 333.683 | 101.646 | 0.81% | +15 13.21 | −42 42.53 | SQ3 |
47 | Sex | Sextans | 313.515 | 95.502 | 0.76% | +10 16.29 | −02 36.88 | SQ2 |
48 | Tuc | Tucana | 294.557 | 89.727 | 0.71% | +23 46.64 | −65 49.80 | SQ4 |
49 | Ind | Indus | 294.006 | 89.559 | 0.71% | +21 58.33 | −59 42.40 | SQ4 |
50 | Oct | Octans | 291.045 | 88.657 | 0.71% | +23 00.00 | −82 09.12 | SQ4 |
51 | Lep | Lepus | 290.291 | 88.428 | 0.70% | +05 33.95 | −19 02.78 | SQ1 |
52 | Lyr | Lyra | 286.476 | 87.266 | 0.69% | +18 51.17 | +36 41.36 | NQ4 |
53 | Crt | Crater | 282.398 | 86.023 | 0.68% | +11 23.75 | −15 55.74 | SQ2 |
54 | Col | Columba | 270.184 | 82.303 | 0.65% | +05 51.76 | −35 05.67 | SQ1 |
55 | Vul | Vulpecula | 268.165 | 81.688 | 0.65% | +20 13.88 | +24 26.56 | NQ4 |
56 | UMi | Ursa Minor | 255.864 | 77.941 | 0.62% | +15 00.00 | +77 41.99 | NQ3 |
57 | Tel | Telescopium | 251.512 | 76.615 | 0.61% | +19 19.54 | −51 02.21 | SQ4 |
58 | Hor | Horologium | 248.885 | 75.815 | 0.60% | +03 16.56 | −53 20.18 | SQ1 |
59 | Pic | Pictor | 246.739 | 75.161 | 0.60% | +05 42.46 | −53 28.45 | SQ1 |
60 | PsA | Piscis Austrinus | 245.375 | 74.745 | 0.59% | +22 17.07 | −30 38.53 | SQ4 |
61 | Hyi | Hydrus | 243.035 | 74.033 | 0.59% | +02 20.65 | −69 57.39 | SQ1 |
62 | Ant | Antlia | 238.901 | 72.773 | 0.58% | +10 16.43 | −32 29.01 | SQ2 |
63 | Ara | Ara | 237.057 | 72.212 | 0.57% | +17 22.49 | −56 35.30 | SQ3 |
64 | LMi | Leo Minor | 231.956 | 70.658 | 0.56% | +10 14.72 | +32 08.08 | NQ2 |
65 | Pyx | Pyxis | 220.833 | 67.270 | 0.54% | +08 57.16 | −27 21.10 | SQ2 |
66 | Mic | Microscopium | 209.513 | 63.821 | 0.51% | +20 57.88 | −36 16.49 | SQ4 |
67 | Aps | Apus | 206.327 | 62.851 | 0.50% | +16 08.65 | −75 18.00 | SQ3 |
68 | Lac | Lacerta | 200.688 | 61.133 | 0.49% | +22 27.68 | +46 02.51 | NQ4 |
69 | Del | Delphinus | 188.549 | 57.435 | 0.46% | +20 41.61 | +11 40.26 | NQ4 |
70 | Crv | Corvus | 183.801 | 55.989 | 0.45% | +12 26.52 | −18 26.20 | SQ3 |
71 | CMi | Canis Minor | 183.367 | 55.857 | 0.44% | +07 39.17 | +06 25.63 | NQ2 |
72 | Dor | Dorado | 179.173 | 54.579 | 0.43% | +05 14.51 | −59 23.22 | SQ1 |
73 | CrB | Corona Borealis | 178.710 | 54.438 | 0.43% | +15 50.59 | +32 37.49 | NQ3 |
74 | Nor | Norma | 165.290 | 50.350 | 0.40% | +15 54.18 | −51 21.09 | SQ3 |
75 | Men | Mensa | 153.484 | 46.754 | 0.37% | +05 24.90 | −77 30.24 | SQ1 |
76 | Vol | Volans | 141.354 | 43.059 | 0.34% | +07 47.73 | −69 48.07 | SQ2 |
77 | Mus | Musca | 138.355 | 42.145 | 0.34% | +12 35.28 | −70 09.66 | SQ3 |
78 | Tri | Triangulum | 131.847 | 40.163 | 0.32% | +02 11.07 | +31 28.56 | NQ1 |
79 | Cha | Chamaeleon | 131.592 | 40.085 | 0.32% | +10 41.53 | −79 12.30 | SQ2 |
80 | CrA | Corona Australis | 127.696 | 38.898 | 0.31% | +18 38.79 | −41 08.85 | SQ4 |
81 | Cae | Caelum | 124.865 | 38.036 | 0.30% | +04 42.27 | −37 52.90 | SQ1 |
82 | Ret | Reticulum | 113.936 | 34.707 | 0.28% | +03 55.27 | −59 59.85 | SQ1 |
83 | TrA | Triangulum Australe | 109.978 | 33.501 | 0.27% | +16 04.95 | −65 23.28 | SQ3 |
84 | Sct | Scutum | 109.114 | 33.238 | 0.26% | +18 40.39 | −09 53.32 | SQ4 |
85 | Cir | Circinus | 93.353 | 28.437 | 0.23% | +14 34.54 | −63 01.82 | SQ3 |
86 | Sge | Sagitta | 79.932 | 24.349 | 0.19% | +19 39.05 | +18 51.68 | NQ4 |
87 | Equ | Equuleus | 71.641 | 21.823 | 0.17% | +21 11.26 | +07 45.49 | NQ4 |
88 | Cru | Crux | 68.447 | 20.850 | 0.17% | +12 26.99 | −60 11.19 | SQ3 |
References
[change | change source]- ↑ The total solid angle of all constellations is the total solid angle of the sky, which is exactly 4π steradians, or 4π × (180/π)2 = 129,600/π square degrees, or approximately 41,252.961 square degrees. The figures in the table do not sum precisely to this number due to rounding errors, which vanish when the areas are rounded instead to one decimal place.
- ↑ Average of the most eastward and most westward RA.
- ↑ Average of the most northern and most southern declination.
- ↑ "Quad" names the quadrant of the sky as N for North or S for South, Quadrants 1 ( 0h– 6h), 2 ( 6h– 12h), 3 ( 12h– 18h), or 4 ( 18h– 0h).
- ↑ Serpens is divided into two parts:
Serpens Caput ("Serpent's Head"; 428.484 sq. deg.; midpoint: RA: 15 46.49, Dec: +10 58.20), and
Serpens Cauda ("Serpent's Tail"; 208.444 sq. deg.; midpoint: RA: 18 07.60, Dec: -04 51.73)