The International Astronomical Union (IAU) designates 88 constellations. In the table below, they are listed by geographical visibility according to latitude as seen from Earth, as well as the best months for viewing the constellations at 21:00 (9 p.m.).

List

Geographical visibilityCelestial coordinatesAbbrev.ConstellationNorthern-most latitudeSouthern-most latitudeMonth for best visibility at 21:00 (9 p.m.)Right ascension(hours & mins)Average of the most eastward and most westward RA.Declination(degs & mins)Average of the most northern and most southern declination.Quad "Quad" designates the quadrant of the sky as N for North or S for South, Quadrants 1 (–), 2 (–), 3 (–), or 4 (–).UMiUrsa Minor 90-10June+15 00.00+77 41.99NQ3CepCepheus 90-10November+02 32.64+71 00.51NQ4CamCamelopardalis 90-10February+08 51.37+69 22.89NQ2DraDraco 90-15July+15 08.64+67 00.40NQ3CasCassiopeia 90-20November+01 19.16+62 11.04NQ1UMaUrsa Major 90-30April+11 18.76+50 43.27NQ2LynLynx 90-55February+07 59.53+47 28.00NQ2LacLacerta 90-40October+22 27.68+46 02.51NQ4PerPerseus 90-35December+03 10.50+45 00.79NQ1CygCygnus 90-40September+20 35.28+44 32.70NQ4AurAuriga 90-40February+06 04.42+42 01.68NQ2CVnCanes Venatici 90-40May+13 06.96+40 06.11NQ3AndAndromeda 90-40November+00 48.46+37 25.91NQ1LyrLyra 90-40August+18 51.17+36 41.36NQ4CrBCorona Borealis 90-50June+15 50.59+32 37.49NQ3LMiLeo Minor 90-45April+10 14.72+32 08.08NQ2TriTriangulum 90-60December+02 11.07+31 28.56NQ1BooBoötes 90-50June+14 42.64+31 12.16NQ3HerHercules 90-50July+17 23.16+27 29.93NQ3VulVulpecula 90-55September+20 13.88+24 26.56NQ4ComComa Berenices 90-70May+12 47.27+23 18.34NQ3GemGemini 90-60February+07 04.24+22 36.01NQ2AriAries 90-60December+02 38.16+20 47.54NQ1CncCancer 90-60March+08 38.96+19 48.35NQ2PegPegasus 90-60October+22 41.84+19 27.98NQ4SgeSagitta 90-70August+19 39.05+18 51.68NQ4TauTaurus 90-65January+04 42.13+14 52.63NQ1PscPisces 90-65November+00 28.97+13 41.23NQ1LeoLeo 90-65April+10 40.03+13 08.32NQ2DelDelphinus 90-69September+20 41.61+11 40.26NQ4EquEquuleus 90-80September+21 11.26+07 45.49NQ4CMiCanis Minor 90-75February+07 39.17+06 25.63NQ2SerSerpensSerpens 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) 80-80July+16 57.04+06 07.32NQ3OriOrion 85-75January+05 34.59+05 56.94NQ1AqlAquila 90-75August+19 40.02+03 24.65NQ4MonMonoceros 75-90February+07 03.63+00 16.93NQ2SexSextans 80-90April+10 16.29−02 36.88SQ2VirVirgo 80-80May+13 24.39−04 09.51SQ3CetCetus 70-90November+01 40.10−07 10.76SQ1OphOphiuchus 80-80July+17 23.69−07 54.74SQ3SctScutum 80-90August+18 40.39−09 53.32SQ4AqrAquarius 65-90October+22 17.38−10 47.35SQ4HyaHydra 54-83April+11 36.73−14 31.91SQ2LibLibra 65-90June+15 11.96−15 14.08SQ3CrtCrater 65-90April+11 23.75−15 55.74SQ2CapCapricornus 60-90September+21 02.93−18 01.39SQ4CrvCorvus 60-90May+12 26.52−18 26.20SQ3LepLepus 63-90January+05 33.95−19 02.78SQ1CMaCanis Major 60-90February+06 49.74−22 08.42SQ2ScoScorpius 40-90July+16 53.24−27 01.89SQ3PyxPyxis 50-90March+08 57.16−27 21.10SQ2SgrSagittarius55-90August+19 05.94−28 28.61SQ4EriEridanus 32-90December+03 18.02−28 45.37SQ1PsAPiscis Austrinus 55-90October+22 17.07−30 38.53SQ4PupPuppis 40-90February+07 15.48−31 10.64SQ2ForFornax 50-90December+02 47.88−31 38.07SQ1SclSculptor 50-90November+00 26.28−32 05.30SQ1AntAntlia 45-90April+10 16.43−32 29.01SQ2ColColumba 45-90January+05 51.76−35 05.67SQ1MicMicroscopium 45-90September+20 57.88−36 16.49SQ4CaeCaelum 40-90January+04 42.27−37 52.90SQ1CrACorona Australis 40-90August+18 38.79−41 08.85SQ4LupLupus 35-90June+15 13.21−42 42.53SQ3GruGrus 34-90October+22 27.39−46 21.11SQ4VelVela 30-90March+09 34.64−47 10.03SQ2CenCentaurus 25-90May+13 04.27−47 20.72SQ3PhePhoenix 32-90November+00 55.91−48 34.84SQ1TelTelescopium 40-90August+19 19.54−51 02.21SQ4NorNorma 30-90June+15 54.18−51 21.09SQ3HorHorologium 30-90December+03 16.56−53 20.18SQ1PicPictor 26-90January+05 42.46−53 28.45SQ1AraAra 25-90July+17 22.49−56 35.30SQ3DorDorado 20-90January+05 14.51−59 23.22SQ1IndIndus 15-90September+21 58.33−59 42.40SQ4RetReticulum 23-90December+03 55.27−59 59.85SQ1CruCrux 20-90May+12 26.99−60 11.19SQ3CirCircinus 30-90June+14 34.54−63 01.82SQ3CarCarina 20-90March+08 41.70−63 13.16SQ2TrATriangulum Australe 25-90July+16 04.95−65 23.28SQ3PavPavo 30-90August+19 36.71−65 46.89SQ4TucTucana 25-90October+23 46.64−65 49.80SQ4VolVolans 15-90February+07 47.73−69 48.07SQ2HyiHydrus 8-90December+02 20.65−69 57.39SQ1MusMusca 10-90May+12 35.28−70 09.66SQ3ApsApus 5-90July+16 08.65−75 18.00SQ3MenMensa 4-90January+05 24.90−77 30.24SQ1ChaChamaeleon 5-90April+10 41.53−79 12.30SQ2OctOctans 0-90October+23 00.00−82 09.12SQ4

Notes and references

See also

Lists of astronomical objects IAU designated constellations by area Lists of stars by constellation