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Cassiopeia Constellation

Cassiopeia (Pronounciation:Cas-see-o-pee-ah, Abbrev:Cas, Latin:Cassiopeiae) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Cassiopeia takes up 598.407 sq. degrees of the night sky which equates to 1.45% of the night sky. The constellation gets its name as it name means Queen of Ethiopia . The constellation is one of the original constellations that was devised by the Ancient Greco-Egyptian astronomer Ptolemy who lived between 90 A.D. and 168 A.D.

Cassiopeia is not a member of the Zodiac group of twelve constellations that appear when the Sun sets. Cassiopeia is a northern hemispheric constellation which means it can't be seen easily or at all from the southern hemisphere.

The brightest star in Cassiopeia is Schedar. There are 13 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site. The current largest star so far identified in the constellation of Cassiopeia is PZ Cassiopeiae.

Cassiopeia Star and Deep Space Object Count

The number of stars that have been catalogued as part of the Hipparcos Star Catalogue from Cassiopeia is 2324. The number of stars that are of magnitude 6.0 or lower in the constellation is 93. The number of stars in the constellation that make up the outline is 5.

There are 2 deep space objects that were identified by Charles Messier in this constellation. There are 1 non-Messier deep space objects that are covered on this site and the list is below.

Stars of Interest

The nearest star to Earth is Achird which is roughly about 19.42 Light Years from the Earth. The nearest star to the Earth with an exoplanet is HD 7924 which is about 54.83 Light Years. The furthest star that can be located in the constellation is HIP 12972 which is located about 326163.3 Light Years away from the Sun. The furthest figure is derived from either the 1997 or 2007 Hipparcos star catalogue parallax figure and it has been known to produce distances that are wrong.

The dimmest star that can be seen in Cassiopeia with the naked eye is 52 Cassiopeiae. The dim star has an apparent magnitude of 6. The dimmest star that a person is able to see with their naked eye is 6.0 magnitude based on the table in the reference. Ref: University of Michigan

The caveat of these stars are that they are catalogued on this site. If you know of a star that is nearer or further then do let me know in the comments and I'll add it to the site. The stars mentioned are from the Hipparcos catalogue or have been added because of their special status.

Constellation Legend

Cassiopeia was the queen of Philistia who was very vain. When her daughter Andromeda was of a mature age, she was tied to a large rock to be sacrificed. Perseus rescued the Princess who then became his wife.

Item of Interest

The star PZ Cassiopeiae is one of the largest stars so far discovered. If it was at the centre of our solar system, we would be inside the star. It is over 1,200 times the size of our Sun but it is not the largest. The largest star accolade goes to UY Scuti at over 1,800 times the radius.

the sun's Constellation

The Sun is not a constellation but if we were on the planet orbiting Proxima Centauri then our Sun would be in Cassiopeia. Our Sun would be located to the south west of Segin, also known as Epsilon Cassiopeiae.

Meteor Showers

There are 17 Meteor Showers that occur during the year within this constellation based on information gathered from Adam Mickiewicz University (Poland). The ones listed as the ones I've been able to find a date range for. For others if you have the time, you can visit the AMU site, obtains the SL value then use IMO tables to calculate the date. A lot of the Meteor Showers are weak and you need to do a lot of stargazing to spot them.

NameActivityPeak ActivityClosest Star
Beta Cassiopeids3 Jul- 19 Aug29-JulCaph

Cassiopeia Facts

Is a Zodiac Sign No
Largest StarPZ Cassiopeiae
Brightest StarSchedar
Area598.407 sq. deg.
Percentage of Night Sky1.45%
Size Position25th
Hemisphere Northern
Site Exoplanet Count13
Meteor Shower Count17
Nearest StarAchird
Nearest Star with Exoplanet(s)HD 7924
Dimmest Star52 Cassiopeiae
Furthest StarHIP 12972
Bright Star Count93
Hipparcos Star Count2324
Main Star Count5
Messier Deep Space Object Count2
*Non-Messier Deep Space Object Count1
Bordering / Neighbouring / Surrounding ConstellationsCepheus

*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.

Cassiopeia Constellation Map

Cassiopeia Constellation Star Map

The map was generated using Night Vision, an awesome free application by Brian Simpson.

List of Stars with Exoplanets in Cassiopeia

StarDistance (Lt. Yrs.)Exoplanet CountDeclinationRight Ascension
HD 11755763.851+73d 09` 09.101h 58m 50.20
HD 13908232.142+65d 35` 40.002h 18m 14.53
HD 17156244.681+71d 45` 11.902h 49m 44.32
HD 2200741058.971+61d 58` 12.523h 20m 14.37
HD 220842203.471+56d 53` 10.323h 26m 37.08
HD 221585187.451+63d 09` 19.523h 32m 53.48
HD 24023717166.491+58d 02` 35.723h 15m 42.22
HD 2952372.331+54d 53` 42.300h 33m 10.32
HD 792454.833+76d 42` 37.301h 21m 59.20
WASP-93151d 17` 20.0000h 37m 50.00

List of Named Stars in Cassiopeia without Extrasolar Planets

As there's so many stars in the cosmos, not all the stars are listed here. The site has lots of stars not listed so if your star isn't listed and you know the Henry Draper or Hipparcos ID, type https://www.universeguide.com/star/ then followed by the HIPNNNNNN or HDNNNN where NNNNN is the number part of the name. The stars that I do list have either a traditional name, a bayer or other classification name.

StarDistance (Lt. Yrs.)DeclinationRight Ascension
1 Cassiopeiae1128.59+59d 25` 11.223h 06m 36.81
10 Cassiopeiae867.46+64d 11` 46.200h 06m 26.53
12 Cassiopeiae701.43+61d 49` 51.800h 24m 47.49
13 Cassiopeiae760.29+66d 31` 10.700h 31m 25.20
16 Cassiopeiae618.91+66d 45` 01.300h 34m 24.89
2 Cassiopeiae1744.19+59d 19` 57.723h 09m 44.14
23 Cassiopeiae771.07+74d 50` 51.300h 47m 46.02
31 Cassiopeiae276.88+68d 46` 43.301h 10m 39.27
32 Cassiopeiae388.29+65d 01` 08.001h 11m 41.37
35 Cassiopeiae254.82+64d 39` 29.501h 21m 05.19
38 Cassiopeiae94.51+70d 15` 53.201h 31m 13.52
4 Cassiopeiae785.94+62d 16` 58.223h 24m 50.25
40 Cassiopeiae458.09+73d 02` 24.301h 38m 30.94
42 Cassiopeiae277.59+70d 37` 21.201h 42m 55.73
43 Cassiopeiae388.75+68d 02` 35.001h 42m 20.44
44 Cassiopeiae1045.40+60d 33` 04.901h 43m 19.74
47 Cassiopeiae108.14+77d 16` 53.202h 05m 07.05
48 Cassiopeiae115.01+70d 54` 25.402h 01m 57.55
49 Cassiopeiae400.20+76d 06` 54.402h 05m 31.58
50 Cassiopeiae157.11+72d 25` 16.502h 03m 26.19
52 Cassiopeiae273.63+64d 54` 05.402h 02m 52.49
53 Cassiopeiae1753.57+64d 23` 24.102h 03m 00.19
54 Cassiopeiae88.56+71d 33` 09.302h 09m 07.69
55 Cassiopeiae713.71+66d 31` 28.002h 14m 29.10
6 Cassiopeiae6154.03+62d 12` 52.323h 48m 50.17
68 Cassiopeiae623.64+47d 51` 50.300h 44m 26.23
9 Cassiopeiae3882.90+62d 17` 15.600h 04m 13.66
Achird19.42+57d 48` 59.600h 49m 05.10
AO Cassiopeiae2398.26+51d 25` 59.100h 17m 43.07
AR Cassiopeiae621.26+58d 32` 56.123h 30m 01.92
Caph54.74+59d 09` 00.800h 09m 10.09
Castula328.46+58d 58` 22.100h 55m 00.19
Castula199.85+59d 10` 52.200h 56m 40.01
CC Cassiopeiae1863.79+59d 33` 48.503h 14m 05.33
Chi Cassiopeiae208.15+59d 13` 55.501h 33m 55.93
Cih549.10+60d 43` 00.300h 56m 42.50
DL Cassiopeiae1482.56+60d 12` 43.100h 29m 58.59
DO Cassiopeiae532.95+60d 33` 11.802h 41m 24.11
FM Cas +56d 15` 10.600h 14m 28.24
Fulu593.02+53d 53` 49.000h 36m 58.27
Gliese 83.3906.01+61d 54` 18.302h 01m 59.05
HR 24461.14+61d 07` 24.800h 53m 04.28
HR 297263.46+61d 34` 48.901h 04m 19.55
HR 570.05+58d 26` 12.100h 06m 15.54
HR 51132.84+63d 51` 11.201h 47m 44.06
HR 8770849.38+55d 14` 10.923h 02m 43.88
HR 883221.35+57d 10` 03.523h 13m 14.74
HR 9017550.02+64d 52` 35.323h 48m 39.03
HR 9059231.49+55d 42` 20.623h 57m 08.49
Iota Cassiopeiae132.86+67d 24` 08.602h 29m 03.99
Kappa Cassiopeiae4467.99+62d 55` 54.400h 32m 59.99
Lambda Cassiopeiae377.50+54d 31` 20.400h 31m 46.32
Marfark133.56+55d 08` 59.801h 11m 05.93
Mu Cassiopeiae24.64+54d 55` 27.201h 08m 12.92
Nu Cassiopeiae411.82+50d 58` 05.500h 48m 49.99
Omega Cassiopeiae701.43+68d 41` 07.001h 56m 00.00
Omicron Cassiopeiae702.94+48d 17` 03.800h 44m 43.50
Phi Cassiopeiae12080.12+58d 13` 53.801h 20m 04.92
Pi Cassiopeiae175.07+47d 01` 28.700h 43m 28.09
Psi Cassiopeiae195.07+68d 07` 47.801h 25m 55.90
PZ Cassiopeiae18120.19+61d 47` 22.223h 44m 03.29
R Cassiopeiae410.27+51d 23` 19.523h 58m 24.79
Rho Cassiopeiae11648.69+57d 29` 57.823h 54m 23.04
Ruchbah99.41+60d 14` 07.501h 25m 48.60
RZ Cassiopeiae211.25+69d 38` 03.102h 48m 55.51
Schedar228.25+56d 32` 14.700h 40m 30.39
Segin411.82+63d 40` 12.501h 54m 23.68
Sigma Cassiopeiae4530.05+55d 45` 17.823h 59m 00.53
SU Cassiopeiae1289.18+68d 53` 18.702h 51m 58.75
SX Cassiopeiae771.07+54d 53` 29.400h 10m 42.07
T Cassiopeiae3977.60+55d 47` 33.300h 23m 14.25
Tau Cassiopeiae173.95+58d 39` 06.723h 47m 03.39
TU Cassiopeiae4593.85+51d 16` 49.300h 26m 19.45
TV Cassiopeiae516.08+59d 08` 20.600h 19m 18.70
TW Cassiopeiae849.38+65d 43` 35.102h 45m 54.81
TZ Cassiopeiae8363.16+61d 00` 08.423h 52m 56.24
V Cassiopeiae1524.13+59d 41` 59.023h 11m 40.70
V368 Cassiopeiae7412.80+59d 55` 10.903h 12m 35.54
V373 Cassiopeiae19186.08+57d 24` 43.823h 55m 33.84
V465 Cassiopeiae1136.46+57d 48` 11.401h 18m 13.89
V486 Cas+52d 20` 13.800h 42m 37.99
V487 Cassiopeiae54360.56+63d 46` 23.401h 06m 59.74
V509 Cassiopeiae4467.99+56d 56` 43.423h 00m 05.10
V605 Cas1568.09+59d 40` 16.902h 20m 22.46
V636 Cassiopeiae1639.01+63d 35` 37.701h 32m 43.23
V649 Cassiopeiae3507.13+61d 57` 46.623h 16m 27.05
V745 Cassiopeiae1226.18+62d 14` 29.000h 22m 53.34
V755 Cas3749.00+64d 17` 28.600h 42m 50.07
V761 Cassiopeiae657.59+61d 42` 22.301h 13m 09.82
V762 Cassiopeiae2764.10+71d 44` 37.801h 16m 11.90
V764 Cas1896.30+57d 37` 55.501h 17m 26.29
V772 Cas1217.03+61d 02` 17.701h 42m 02.90
V773 Cassiopeiae277.11+57d 32` 12.001h 44m 17.91
V777 Cas959.30+59d 16` 24.401h 55m 42.85
V779 Cas626.03+75d 30` 07.902h 02m 09.27
V784 Cassiopeiae335.56+59d 58` 47.802h 10m 25.46
V801 Cassiopeiae2588.60+62d 23` 04.503h 08m 54.18
V805 Cassiopeiae856.07+71d 51` 50.003h 30m 19.39
V809 Cas1964.84+62d 44` 23.223h 19m 23.77
V816 Cas942.67+64d 30` 55.423h 42m 20.93
V989 Cas60.60+67d 40` 23.002h 15m 41.76
W Cas29651.21+58d 33` 49.100h 54m 53.86
WR 1+64d 45` 35.400h 43m 28.40
WR 3+58d 09` 22.701h 38m 55.63
WZ Cassiopeiae2861.08+60d 21` 19.100h 01m 15.84
Xi Cassiopeiae1430.54+50d 30` 45.100h 42m 03.88
XY Cassiopeiae1190.38+60 d 07` 38.600h 49m 53.27
YZ Cas303.41+74d 59` 17.300h 45m 39.11

List of Deep Space Objects (Galaxies, Nebulas, Supernovas, etc) in Cassiopeia

NameTypeDistanceDeclinationRight Ascension
Heart NebulaEmission Nebula7,50061:26:3602h 33h 22
M103 Open ClusterOpen Cluster10000+60:4201h 33m 2
M52 Open ClusterOpen Cluster5000+61:3523h 42m 2

Cassiopeia Constellation's Star Breakdown

Type Breakdown

AWhite 7,500 - 10,000k571
BBlue-White 10,500 - 30,000k525
KLight Orange Star 3,700 - 5,200k425
FYellow-White 6,000 - 7,500k310
GYellow 5,200 - 6,000k274
MRed Dwarf Star <3,700k79
OBlue Star >33,000k20

Size Breakdown

VMain Sequence304
IIINormal Giant201
IIBright Giant56
IbLess Luminous Supergiant54
IaLuminous Supergiant35
IabIntermediate Luminous Supergiant28
WWolf-Rayet Star4
DDwarf Star1

Breakdown of Dwarf Stars by Type

sdsd Type SubDwarf Star1

Breakdown of Carbon Stars by Type

CC-Type Carbon Star4
NN-Type Carbon Star2
SS-Type Carbon Star1
RR-Type Carbon Star1

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