List of Y-dwarfs

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Template:Short description This is a list of astronomical objects with the spectral type Y. They are a mix of brown dwarfs and planetary-mass objects. They are the coldest such objects in interstellar space and have a temperature around below 500 Kelvin (227°C; 440°F). Only a few are known due to their faint nature. The list is sorted after distance.

List of Y-dwarfs
Name spectral type[1] Teff[1]

(Kelvin)

Mass estimate

(Template:Jupiter mass)

distance[1]

(light years)

Year of discovery
Jupiter Y-class analog[2] 125 1 solar system known since ancient times
WISE J0855−0714 Y4 (extrapolated) 250 ± 50 3−10[3] 7.43 ± 0.04 2014[4]
Epsilon Indi Ab[5] Y3Template:Efn (estimated) 275 Template:Val Template:Val 2018 (discovered) 2024 (imaging)
WISE J1639−6847 Y0pec 412 ± 88 5−14[6] or 9−17[7] 15.45 ± 0.04[8] 2012[9]
WISE J0350−5658 Y1 388 ± 88 3−8[6] or 7−13[7] 18.49 ± 0.24 2012[10]
WISEPA J1541−2250 Y1 Template:Val[11] 8−20[6] 18.9 ± 0.2[12] 2011[13][14]
WISE J2209+2711 Y0[11] Template:Val[11] 8−19[6] or 5[15] 20.17 ± 0.25 2014[16]
WISEPC J1405+5534 Y0.5 (pec?) Template:Val[11] 9−21[6] 20.6 ± 0.3 2011[13][14]
WISEPA J0410+1502 Y0 451 ±88 8−20[6] 21.32 ± 0.10[12] 2011[13][14]
WISE J0825+2805 Y0.5 Template:Val[11] 3−8[6] or 5[15] 21.4 ± 0.4 2015[17]
CWISE J1055+5443[18] Y0 (pec) 500 ± 150 4−6 Template:Val 2023
WISEPC J2056+1459 Y0 Template:Val[11] 13−23[7] or 5[15] 22.27 ± 0.07[12] 2011[13][14]
WISEPA J1738+2732 Y0 450 ± 88 5−14,[6] 3−9[19] or 11−21[7] 24.4 ± 0.2[12] 2011[13][14]
WISEA J2354+0240 Y1 Template:Val[11] 8−14[7] 25.0 ± 0.6 2015[17]
CWISEP J0402−2651 ≥Y1 (estimated) 367 ± 79 Template:Val 2020[20]
WISENF J1936+0408 Y0 (estimated) 460 ± 79 Template:Val 2020[20]
WISE J0647−6232 Y1 393 ± 88 5–13[6] 29.6 ± 0.6[12] 2013[21]
WISE J0713−2917 Y0 464 ± 88 13−29[6] 29.6 ± 0.2[12] 2012[10]
WISEPC J1217+1626 B Y0 460 ± 79 8−20[6] 30.4 ± 1.0 2012[22]
WISEA J1930−2059 ≥Y1 (estimated) 367 ± 79 Template:Val 2020[23]
WISEA J1141−3326 Y0 460 ± 79 3–8[6] 31.4 ± 0.9 2014[24]
CWISEP J1446−2317 Y1[11] 366 ± 14[11] 8.0 or 14.6[25] Template:Val[11] 2020[20]
CWISEP J2256+4002 ≥Y1 (estimated) 367 ± 79 Template:Val 2020[20]
WISEPA J1828+2650 ≥Y2 406 ± 88 3–8[6] Template:Val 2011[13][14]
WISE J0336−0143 A Y0:[26] 460 ± 79 8.5–18[27] 32.7 ± 0.7 2012[10]
WISE J0336−0143 B[27] Y2.5Template:Efn (estimated) 285–305[28] 5–11.5 32.7 ± 0.7 2023
WISEA J0830+2837 ≥Y1 (estimated) 367 ± 79 4−13[29] Template:Val[30] 2020[29]
WISEU J0503−5648 ≥Y1 (estimated) 367 ± 79 Template:Val 2020[23]
WISE J2220−3628 Y0 452 ± 88 8–20[6] 34.9 ± 0.4[12] 2012[10]
CWISE J0925−4720 Y0 (estimated) 460 ± 79 ~35.0 2021[31]
CWISER J0216+4230 Y0 (estimated) 460 ± 79 ~35.2 2023[1]
CWISEP J0238−1332 ≥Y1 (estimated) 367 ± 79 Template:Val 2020[20]
WISE J1206+8401 Y0 Template:Val[11] 6−14[6] or 12−22[7] Template:Val 2015[17]
CWISE J2351−7000 Y0 (estimated) 460 ± 79 ~42.7 2020[23]
WISE J0359−5401 Y0 Template:Val[11] 12−22[7] or 13[15] 44.3 ± 1.2 2012[10]
WISE J0734−7157 Y0 Template:Val[11] 9−20[6] 44.5 ± 0.4[12] 2012[10]
WISE J0304−2705 Y0 pec 465 ± 88 Template:Val 2014[32]
CWISEP J2230+2549 ≥Y1 (estimated) 367 ± 79 Template:Val 2020[20]
CWISEP J2011−4812 Y0 (estimated) 460 ± 79 46 ± 2 2020[20]
CWISE J1811+6658 early-Y (estimated) 412 ± 79 Template:Val 2023[1]
CWISEP J1935−1546 ≥Y1 (estimated) 367 ± 79 Template:Val 2019[33]
WISE J0535−7500 Y1[11] Template:Val[11] 8−20[6] or 12+18[15] Template:Val 2012[10]
CWISEP J1047+5457 Y1[11] Template:Val[11] 20.6 or 15.9[25] or 1–3[30] Template:Val[11] 2020[20]
CWISEP J0321+6932 Y0.5 (estimated) 412 ± 79 48 ± 3 2020[20]
WISEA J2243−1458 Y0 (estimated) 460 ± 79 ~47.8 2020[23]
CWISEP J0938+0634 Y0 (estimated) 460 ± 79 Template:Val 2020[20]
CWISEP J0940+5233 ≥Y1 (estimated) 367 ± 79 Template:Val 2020[20]
CWISEP J0634+5049 Y0 (estimated) 460 ± 79 Template:Val 2020[20]
WISEA J1534−1043 esdY0–esdY2 (estimated)[34] 447 ± 45[35] 53 ±4 2020[20]
WISEA J1257+7153 ≥Y1 (estimated) 367 ± 79 ~54.2 2020[23]
WISEA J0302−5817 Y0: 460 ± 79 55 ± 3 2018[36]
CWISE J1531−3306 Y0 (estimated) 460 ± 79 ~55.4 2021[31]
CWISEP J2356−4814 Y0.5 (estimated) 412 ± 79 ~56.6 2020[20]
Ross 19 B sdY (estimated)[34] 460 ±79 15−40[37] 56.89 ± 0.04 2021[37]
WISE 0226-0211 B T9.5 to Y0 (estimated) 511 ±79 Template:Val 2019[38]
L 97-3 B Y1 (estimated) 377 ± 88 7−9[6] 62.73 ± 0.02 2011[39]
WISE J0146+4234 B Y0 460 ± 79 8−20[6] 63 ± 2 2015[40]
CWISE J2227+2604 Y0 (estimated) 460 ± 79 ~65.2 2023[1]
CWISEP J0859+5349 Y0 (estimated) 460 ± 79 Template:Val 2020[20]
CFBDSIR 1458+10 B[41] Y0 (estimated) 370 ± 40 6–15 75.34 ± 7.83 2011
CWISEP J0156+3255 sdY (estimated) Template:Val 2020/2024[20][34]

Notes

Template:Notelist

References

Template:Reflist

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Cite error: Invalid <ref> tag; no text was provided for refs named Kirkpatrick23
  2. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Coulter22
  3. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Luhman24
  4. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Luhman14
  5. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Matthews2024
  6. ↑ 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.10 6.11 6.12 6.13 6.14 6.15 6.16 6.17 6.18 Cite error: Invalid <ref> tag; no text was provided for refs named Leggett17
  7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 Cite error: Invalid <ref> tag; no text was provided for refs named Fontanive23
  8. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Fontanive21
  9. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Tinney12
  10. ↑ 10.0 10.1 10.2 10.3 10.4 10.5 10.6 Cite error: Invalid <ref> tag; no text was provided for refs named Kirkpatrick12
  11. ↑ 11.00 11.01 11.02 11.03 11.04 11.05 11.06 11.07 11.08 11.09 11.10 11.11 11.12 11.13 11.14 11.15 11.16 11.17 Cite error: Invalid <ref> tag; no text was provided for refs named Beiler2024
  12. ↑ 12.0 12.1 12.2 12.3 12.4 12.5 12.6 12.7 Cite error: Invalid <ref> tag; no text was provided for refs named Fontanive2024
  13. ↑ 13.0 13.1 13.2 13.3 13.4 13.5 Cite error: Invalid <ref> tag; no text was provided for refs named Kirkpatrick11
  14. ↑ 14.0 14.1 14.2 14.3 14.4 14.5 Cite error: Invalid <ref> tag; no text was provided for refs named Cushing11
  15. ↑ 15.0 15.1 15.2 15.3 15.4 Cite error: Invalid <ref> tag; no text was provided for refs named Leggett24
  16. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Cushing14
  17. ↑ 17.0 17.1 17.2 Cite error: Invalid <ref> tag; no text was provided for refs named Schneider15
  18. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Robbins23
  19. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Leggett16
  20. ↑ 20.00 20.01 20.02 20.03 20.04 20.05 20.06 20.07 20.08 20.09 20.10 20.11 20.12 20.13 20.14 20.15 Cite error: Invalid <ref> tag; no text was provided for refs named Meisner20a
  21. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Kirkpatrick13
  22. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Liu12
  23. ↑ 23.0 23.1 23.2 23.3 23.4 Cite error: Invalid <ref> tag; no text was provided for refs named Meisner20b
  24. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Tinney14
  25. ↑ 25.0 25.1 Cite error: Invalid <ref> tag; no text was provided for refs named Tu2024
  26. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Martin18
  27. ↑ 27.0 27.1 Cite error: Invalid <ref> tag; no text was provided for refs named Calissendorff23
  28. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Leggett2023
  29. ↑ 29.0 29.1 Cite error: Invalid <ref> tag; no text was provided for refs named Bardalez Gagliuffi20
  30. ↑ 30.0 30.1 Cite error: Invalid <ref> tag; no text was provided for refs named Albert2025
  31. ↑ 31.0 31.1 Cite error: Invalid <ref> tag; no text was provided for refs named Kirkpatrick21
  32. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Pinfield14
  33. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Marocco19
  34. ↑ 34.0 34.1 34.2 Cite error: Invalid <ref> tag; no text was provided for refs named Jun-Yan Zhang2024
  35. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Burgasser2024
  36. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Tinney18
  37. ↑ 37.0 37.1 Cite error: Invalid <ref> tag; no text was provided for refs named Schneider21
  38. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Kirkpatrick2019
  39. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Luhman11
  40. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Dupuy15
  41. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Liu11
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