List of coolest stars

This is a list of coolest stars and brown dwarfs discovered, arranged by decreasing temperature. The stars with temperatures lower than 2,000 K are included.

Kirkpatrick et al. 2021[1] has a more complete list of nearby objects with a temperature below 2,400 K. Objects with a temperature below 500 K from this paper were included in this list.

List
Star name Temperature

(K)

 Spectral type Distance (light years) Notes
WISE J0855-0714 225–260[2] Y4 7.27±0.13
WISE 0336-0143B[3] 295±10[4] Y1? 32.7[1] spectral type is not yet published, but should be around Y1 if we assume MIRI F480M is similar to W2 and by using Figure 13 from Kirkpatrick et al. 2012[5] Might be a later spectral type.
WISEA 0830+2837 300-350[6] >Y1[1] 26.87[1] uncertain parallax and spectral type is an estimate
CWISEP 0238-1332[1] 367±79 >Y1 58.66 uncertain parallax and spectral type is an estimate
CWISEP 0402-2651[1] 367±79 >Y1 39.53 uncertain parallax and spectral type is an estimate
WISEU 0503-5648[1] 367±79 >Y1 33.18 spectral type is an estimate
CWISEP 0940+5233[1] 367±79 >Y1 43.49 uncertain parallax and spectral type is an estimate
WISEA 1257+7153[1] 367±79 >Y1 54.18 spectral type is an estimate
CWISEP 1446-2317[1] 367±79 >Y1 37.75 uncertain parallax and spectral type is an estimate
WISEA 1930-2059[1] 367±79 >Y1 30.67 spectral type is an estimate
CWISEP 1935-1546[1] 367±79 >Y1 47.06 spectral type is an estimate
CWISEP 2230+2549[1] 367±79 >Y1 52.44 uncertain parallax and spectral type is an estimate
CWISEP 2256+4002[1] 367±79 >Y1 32.04 spectral type is an estimate
CFBDSIR 1458+10B 370 Y0 104
WISE 0825+2805[1] 376±88 Y0.5 21.37
WD 0806-661B[1] 377±88 Y1 62.80 spectral type is an estimate
WISE 0350-5658[1] 388±88 Y1 18.49
WISEA 2354+0240[1] 388±88 Y1 24.97
WISE 2209+2711[1] 389±88 Y0: 20.17
WISE 0647-6232[1] 393±88 Y1 32.78
WISEPA 1541-2250[1] 395±88 Y1 19.54
WISE 1828+2650 406±88[1] Y2V[7] 32.5 Temperature could be lower. If it is a binary, its components could be as cold as about 275-350 K.[8]
WISE 0535-7500[1] 410±88 >=Y1: 47.48
WISE 1405+5534 411±88[1] Y0.5(pec?)[1] 20.62
CWISEP 0321+6932[1] 412±79 Y0.5 47.61 spectral type is an estimate
WISE 1639-6847[1] 412±88 Y0pec 14.85
CWISEP 2356-4814[1] 412±79 Y0.5 56.62 spectral type is an estimate
WISE 0336-0143A[3] 440±24[9] Y0[1] 32.7[1]
WISEPA 1738+2732[1] 450±88 Y0 24.92
WISEPA 0410+1502[1] 451±88 Y0 21.56
WISE 2220-3628[1] 452±88 Y0 34.15
WISE 1534-1043 453±77[10] sdY? 53 possibly halo brown dwarf
WISE 1206+8401[1] 454±88 Y0 38.51
WISE 0146+4234B[1] 460±79 Y0 63.09
WISEA 0302-5817[1] 460±79 Y0: 54.45
CWISEP 0634+5049[1] 460±79 Y0 52.61 spectral type is an estimate
CWISEP 0859+5349[1] 460±79 Y0 60.62 spectral type is an estimate
CWISE 0925-4720[1] 460±79 Y0 34.96 spectral type is an estimate
CWISEP 0938+0634[1] 460±79 Y0 61.31 uncertain parallax and spectral type is an estimate
CWISEP 1047+5457[1] 460±79 Y0 43.37 spectral type is an estimate
CWISE 1121-6232[1] 460±79 Y0 33.69 spectral type is an estimate
WISEA 1141-3326[1] 460±79 Y0 31.36
WISE 1217+1626 B 460±79[1] Y0-0.5 33
CWISE 1531-3306[1] 460±79 Y0 55.37 spectral type is an estimate
WISENF 1936+0408[1] 460±79 Y0 28.64 spectral type is an estimate
CWISEP 2011-4812[1] 460±79 Y0 45.94 spectral type is an estimate
WISEA 2243-1458[1] 460±79 Y0 47,75 spectral type is an estimate
WISE 1112-3857[1] 461±88 T9 31.79
WISE 0734-7157[1] 462±88 Y0 43.78
WISE 0713-2917[1] 464±88 Y0 29.84
WISEPC 2056+1459[1] 464±88 Y0 23.16
WISE 0304-2705[1] 465±88 Y0~pec 44.62
WISE 0359-5401 467+16
−18[11]		 Y0[1] 44.31[1]
WISE 0943+3607[1] 468±88 T9.5 33.59
WISE 0833+0052[1] 472±88 (sd)T9 40.92 possible subdwarf
WISE 1542+2230[1] 472±88 T9.5 38.69
WISE 0811-8051[1] 479±88 T9.5: 32.91
WISEPA 2134-7137[1] 481±88 T9~pec 29.73 possible subdwarf
WISE 2212-6931[1] 487±88 T9 40.47
WISEPA 0751-7634[1] 492±88 T9 33.32
WISE 0335+4310[1] 492±88 T9 38.46
WISE 1217+1626 A 575 T8.5-9 33
UGPS J0521+3640 600–650 T8.5 26.7
2MASS 0939-2448 A/B 650[12] T8 17.4±0.4
2MASS 0415-0935 764 T8V 18.6±0.2
2M 1237+6526 850[13] T6.5 46
2MASS J0348−6022 880 T7[14] 27.2
SCR 1845-6357B 950 T6 13.050±0.008
Epsilon Indi Bb 993 T6 12.05
2MASS 0243-2453 1,050 T6 35±1
Cha 110913-773444 1,350 M9.5 529
Epsilon Indi Ba 1,353 T1-1.5 12.05
2MASS 0036+1821 1,650 L3.5 28.51±0.05
2MASS 1507-1627 1,650 L5 24.12±0.06
OTS 44 1,700 M9.5 554
GD 165 B 1,755[15] L4[16] 109
S Cassiopeiae 1,800 S3,4–S5,8 3,100±300
V384 Persei 1,820[17] N
DENIS-P J1058.7−1548 1,850[18] L3 49
T Draconis 1,850[17] C6,2e
V346 Puppis 1,875[17] C
S Aurigae 1,940[17] C-N5+
V1426 Cygni 1,975[17] C7,2e

See also


References
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