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SSSPM J0829-1309
...This is a list of stars, neutron stars, white dwarfs and brown dwarfs which are the least voluminous known (the smallest stars by volume).
List
 |
Notable small stars
This is a list of small stars that are notable for characteristics that are not separately listed.
| Star name | Star mean radius, kilometres | Star class | Notes | References |
|---|---|---|---|---|
| RX J0720.4−3125 | 4.50+0.08 −0.09 – 5.38+0.13 −0.14 |
Neutron star | Neutron stars are stellar remnants produced when a star of around 8–9 solar masses or more explodes in a supernova at the end of its life. They are usually produced by stars of less than 20 solar masses, although a more massive star may produce a neutron star in certain cases. | [1] |
| 4U 1820-30 | 9.1 | Pulsar | [2] | |
| PSR B0943+10 | 10 or 2.6[a] | Pulsar (quark star?) | [3] | |
| PSR B1257+12 | 10 | Pulsar | Orbited by three planets. | [4] |
| PSR B0531+21 (Crab pulsar) | 10 | Relatively young at 7200 (or 970 relative to Earth) years old as of May 2024. | [5] | |
| Geminga | 10 | [6] | ||
| XTE J1739-285 | 10.9 | Pulsar (quark star?) | [7] | |
| PSR J1906+0746 | 11.99 – 12.85 | Pulsar | [8] | |
| PSR J2043+1711 | 12.13 – 12.96 | [8] | ||
| PSR J1933–6211 | 12.15 – 12.98 | [8] | ||
| Vela pulsar | 12.52 – 13.30 | [8] | ||
| PSR J0348+0432 A | 13 ± 2 | Orbited by a white dwarf star (see below) | [9] | |
| PSR J1614−2230 | 13 ± 2 | [10] | ||
| GX 13+1 | ≲14.50 | Neutron star | [11] | |
| PSR J1748-2446ad | <16 | Pulsar | Fastest-spinning pulsar known. | [12] |
| RX J1856.5−3754 | 19 | Neutron star | Closest neutron star discovered to date. | [13] |
| PSR B1620-26 A | 24 | Pulsar | An exoplanet orbits PSR B1620-26 A and its white dwarf companion (see below) in a circumbinary orbit. | |
| HD 49798 | 1,600 | White dwarf | One of the smallest white dwarf stars known. | [14] |
| ZTF J1901+1458 | 1,809 | Currently the most massive white dwarf known. | [15] | |
| Janus | 3,400 | A white dwarf with a side or hydrogen and another side of helium. | [16] | |
| Wolf 1130 B | 3,480 | [17] | ||
| IK Pegasi B | 4,174 | The nearest supernova candidate. (Type Ia) | [18] | |
| Sirius B | 5,466 | Historically first detected white dwarf star | [19] | |
| LB 1497 | 5,494.5 | [20] | ||
| 40 Eridani B | 5,547.5 | |||
| U Geminorum white dwarf | 5,565 | [21] | ||
| BPM 37093 | 5,750 | [22][b] | ||
| GRW +70 8247 (Gliese 742) | 5,950 | [23][c] | ||
| Gliese 915 | 6,748.3 | [24] | ||
| AE Aquarii A | 6,950 | [25] | ||
| AR Scorpii | 6,950 | The only known white dwarf pulsar | [26] | |
| G 29-38 | 6,950 | [27] | ||
| LP 145-141 | 6,950 | 4th nearest white dwarf.[28] | ||
| PSR B1620-26 B | 6,950 | An exoplanet orbits PSR B1620-26 B and its pulsar companion (see above) in a circumbinary orbit. | ||
| Van Maanen 2 | 6,950 | 3rd nearest white dwarf. | [29] | |
| WD 0810–353 | 6,950 | [30] | ||
| YZ Leonis Minoris A | 6,950 | [31] | ||
| QS Virginis A | 7,658 | [32] | ||
| Stein 2051 B | 7,930 | [33] | ||
| Ross 548 (ZZ Ceti) | 8,209 | [34] | ||
| CR Boötis A | 8,350 | [35] | ||
| DQ Herculis A | 8,420 | A slow, bright nova that reached peak brightness on 22 December 1934 with an apparent magnitude of 1.5.[36] | [37] | |
| Procyon B | 8,595 | Second nearest white dwarf. | [38] | |
| GD 165 A | 8,626.5 | [34] | ||
| ESO 439-26 | 8,775.5 | Faintest known white dwarf.[39] | ||
| Gliese 293 | 8,900[d] | [24] | ||
| Wolf 489 | 9,044 | [40] | ||
| HD 44120 C | 9,044 | [41] | ||
| WD 1856+534 | 9,113.67 | [42] | ||
| Epsilon Reticuli B | 9,185 | [43] | ||
| KOI-256 B | 9,350 | [44] | ||
| RR Caeli white dwarf | 10,908.5 | [45] | ||
| WD 1145+017 | 13,926.84 | Host star of one of the smallest exoplanets. | [46] | |
| NN Serpentis white dwarf | 14,679.5 | [47] | ||
| Beta Crateris B | 18,800 | [48] | ||
| Feige 55 | 19,450 | [49][e] | ||
| Central star of the Dumbbell Nebula | 38,265 | [50] | ||
| KPD 0005+5106 | 41,045 | [51] | ||
| PSR J0348+0432 B | 45,268 | A white dwarf that orbits its pulsar companion (see above) | [9] | |
| TMTS J052610.43+593445.1 | 45,916 | B-type subdwarf | Smallest known non-degenerate star. | [52] |
| WISEA 1810−1010 | 46,840 | Brown dwarf | Smallest known brown dwarf. | [53] |
| EPIC 201702477 | 54,120 | [54] | ||
| BE Ursae Majoris A | 54,250 | O-type subdwarf | [55] | |
| Epsilon Indi Ba | 55,656 | Brown dwarf | [56] | |
| LHS 6343 C | 55,978 | [57] | ||
| Epsilon Indi Bb | 57,050 | [56] | ||
| 54 Piscium B | 57,050 | [58] | ||
| 2MASS J1126−5003 | 57,193.5 | [59] | ||
| UGPS J0521+3640 | 57,193.5 | |||
| Wolf 1130 C | 58,625 | [60] | ||
| EBLM J0555-57Ab | 60,000 | Red dwarf | This red dwarf has a size comparable to that of the planet Saturn. As of 2019, it is the second lightest hydrogen-fusing star known, marginally heavier (0.0777-0.0852M☉) than the 2MASS J0523-1403. Although its mass is comparable to that of TRAPPIST-1, its radius is 1/3 smaller. | [61][62][63] |
| Luhman 16 A | 60,768 | Brown dwarf | Luhman 16 A and Luhman 16 B are the closest brown dwarf stars to Earth, and the third-nearest star system to the Solar System. | [f] |
| SSSPM J0829-1309 | 61,300 | Red dwarf | An L2 dwarf that is fusing hydrogen. Similarly to 2MASS J0523-1403, SSSPM J0829-1309 is one of the least luminous and massive hydrogen-fusing stars, and is smaller than Jupiter. | [64][65] |
| WISE 1405+5534 | 61,483 | Brown dwarf | [66] | |
| 2MASS 0939-2448 B | 62,600 | [67] | ||
| WISE 0855−0714 | 63,500 | Coolest known brown dwarf. | [68][g] | |
| 2MASS 0243−2453 | 64,000 | [69] | ||
| W1906+40 | 64,350 | In 2015 it was shown to have on its surface a storm the size of Jupiter's Great Red Spot. | ||
| 2MASS J0348−6022 | 64,700 | [70] | ||
| SDSS J1416+1348 A | 65,772.5 | [71] | ||
| WISEPC J205628.90+145953.3 | 66,487.5 | [66] | ||
| WISE 1738+2732 | 66,487.5 | [66] | ||
| SCR 1845−6357 A | 66,790 | Red dwarf | ||
| 2MASS 0937+2931 | 67,200 | Brown dwarf | [72] | |
| WISE 0359−5401 | 67,200 | In June 2023, it became the first Y-dwarf with a spectral energy distribution measured by the James Webb Space Telescope. | [73][74] | |
| 2MASS J22282889–4310262 | 67,200 | [75] | ||
| SDSS J1416+1348 B | 67,200 |
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