List of white dwarfs

This is a list of exceptional white dwarf stars. An extensive database of all known white dwarfs and their properties is available in the Montreal White Dwarf Database.^[1]

Firsts

These were the first white dwarfs discovered fitting these conditions

Title	Star	Date	Data	Comments	Notes	Refs
First discovered	40 Eridani B	1783				[2][3]
First found in a binary star system
First double white dwarf system	LDS 275	1944	L 462-56 system			[4]
First solitary white dwarf	Van Maanen 2	1917		Van Maanen's star is also the nearest solitary white dwarf		[5]
First white dwarf with a planet	WD B1620−26	2003	PSR B1620-26 b (planet)	This planet is a circumbinary planet, which circles both stars in the PSR B1620-26 system		[6][7]
First singular white dwarf with a transiting object	WD 1145+017	2015		Known object is a disintegrating planetesimal, most likely an asteroid.		[8]
First white dwarf that is a pulsar	AR Scorpii A	2016		The star is in a binary system with a red dwarf		[9]

Extremes

These are the white dwarfs which are currently known to fit these conditions

Title	Star	Date	Data	Comments	Notes	Refs
Nearest	Sirius	1852	8.6 ly (2.6 pc)	Sirius B is also the second white dwarf discovered.		[2][3]
Farthest	SN UDS10Wil progenitor	2013	10,000,000,000 ly z=1.914	SN Wilson is a type-Ia supernova whose progenitor was a white dwarf		[10][11][12]
Oldest	WD 0346+246	2021	11.5 billion years			[13]
Youngest
Highest surface temperature	RX J0439.8−6809	2015	250,000 K (250,000 °C; 450,000 °F)	This star is located in the Milky Way's galactic halo, in the field of the Large Magellanic Cloud		[14][15][13]
Lowest surface temperature	PSR J2222–0137 B WD J2147–4035	2021 2022	3,000 K 3,050 K	in binary single		[13][16]
Most luminous	V Sagittae	2001	30,000 L☉			[17]
Least luminous	WD 0343+247		1.62×10−5 L☉			[18][19]
Brightest apparent	Sirius B	1852	8.44 (V)
Dimmest apparent
Most massive	ZTF J1901+1458[20]	2020	1.35 M☉			[20]
Least massive	CR Boötis B	2022	0.07 M☉	In a tight 24 minute binary.		[21]
Largest	V Sagittae	2001	1.2 R☉			[17]
Smallest	HD 49798	2021	0.0023 R☉			[22]

Nearest

10 nearest white dwarfs

Star	Distance	Comments	Notes	Refs
Sirius B	8.58 ly (2.63 pc)	Sirius B is also the second white dwarf discovered. It is part of the Sirius system.		[2][3][23][24]
Procyon B	11.43 ly (3.50 pc)	Part of Procyon system		[23][24]
van Maanen's Star	14.04 ly (4.30 pc)			[23][24]
GJ 440	15.09 ly (4.63 pc)			[23]
40 Eridani B	16.25 ly (4.98 pc)	Part of 40 Eridani system		[23][24]
Stein 2051 B	18.06 ly (5.54 pc)	Part of Stein 2051 system		[23][24]
LP 44-113	20.0 ly (6.1 pc)			[24]
G 99-44	20.9 ly (6.4 pc)			[24]
L 97-12	25.8 ly (7.9 pc)			[24]
Wolf 489	26.7 ly (8.2 pc)			[24]

Other notable white dwarfs

• SDSS J1228+1040, a white dwarf with a disk of debris.
• ZTF J203349.8+322901.1, a white dwarf with one side made up of hydrogen and the other of helium, nicknamed Janus^[25][26]