List of noteworthy asteroids
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The following is a collection of lists of noteworthy asteroids in the Solar system, sometimes also including minor planets beyond the orbit of Jupiter. For a more complete list of asteroids in sequential numerical order, see List of asteroids.
Note: each asteroid is given a unique sequential identifying number after its orbit is precisely determined. Prior to this, asteroids are known only by their systematic name or provisional designation, such as "1950 DA".
[edit] Largest known asteroids (out to the orbit of Jupiter)
The number of bodies grows rapidly as the size decreases. For example, there are estimated to be another twelve asteroids with diameters between 200 and 224 km.
The inner main belt (defined as the region interior to the 3:1 Kirkwood gap at 2.50 AU) has few large asteroids. Only 4 Vesta and 9 Metis qualify for the above list.
For a listing by mass see here.
[edit] Brightest asteroids (from Earth)
Although only Vesta ever attains a brightness sufficient to be visible to the naked eye, the following asteroids can all reach a magnitude higher than the maximum 8.3 attained by Saturn's moon Titan, which was, owing to its closeness to easily visible Saturn, discovered 145 years before the first asteroid was found.
It is noteworthy that none of the asteroids in the outer part of the asteroid belt can ever attain this brightness. Even Hygiea and Interamnia rarely reach magnitudes of above 10.0. This is due to the different distribution of spectral types within different sections of the asteroid belt being such that the highest-albedo asteroids are all concentrated closer to Mars, and much lower albedo C and D types being common in the outer belt.
Those asteroids with very high eccentricities will only reach their maximum magnitude on unusual occasions when their perihelion is very close to a heliocentric conjunction with Earth.
Asteroid | Maximum opposition magnitude |
Mean Distance from Sun (in AU) |
Eccentricity of orbit |
---|---|---|---|
4 Vesta | 5.1 | 2.361 | 0.089172 |
2 Pallas | 6.4 | 2.773 | 0.230725 |
1 Ceres | 6.7 | 2.766 | 0.079905 |
7 Iris | 6.7 | 2.385 | 0.231422 |
433 Eros | 6.8 | 1.458 | 0.222725 |
6 Hebe | 7.5 | 2.425 | 0.201726 |
3 Juno | 7.5 | 2.668 | 0.258194 |
18 Melpomene | 7.5 | 2.296 | 0.218708 |
15 Eunomia | 7.9 | 2.643 | 0.187181 |
8 Flora | 7.9 | 2.202 | 0.156207 |
324 Bamberga | 8.0 | 2.682 | 0.338252 |
1036 Ganymed | 8.1 | 2.6657 | 0.533710 |
9 Metis | 8.1 | 2.387 | 0.121441 |
192 Nausikaa | 8.2 | 2.404 | 0.246216 |
20 Massalia | 8.3 | 2.409 | 0.142880 |
[edit] Retrograde and high-inclination asteroids and damocloids
Asteroids with orbital inclinations greater than 90° orbit in a retrograde direction. There are only eight (as of August 2004) retrograde asteroids known, only two of which are numbered. This makes them the rarest group of all. High-inclination asteroids are either Mars-crossers (probably in the process of being ejected from the solar system) or damocloids.
Retrograde | |||
---|---|---|---|
Name | Inclination | Discovery date | Comment |
20461 Dioretsa | 160.400° | June 8, 1999 | This outer-planet crosser is a damocloid and scattered disk object (SDO); 2000 HE46 may have split off from Dioretsa. |
1999 LE31 | 151.867° | June 12, 1999 | A damocloid, SDO, Jupiter- and Saturn-crosser asteroid. |
2000 DG8 | 129.381° | February 25, 2000 | A damocloid and SDO. Crosses all the outer planets except Neptune. |
2000 HE46 | 158.459° | April 29, 2000 | This outer-planet crosser is a damocloid and SDO. May be a fragment of 20461 Dioretsa. |
(65407) 2002 RP120 | 119.112° | September 4, 2002 | This outer-planet crosser is a damocloid and SDO. |
2004 NN8 | 165.377° | July 13, 2004 | This outer-planet crosser could even be on a path headed out of the Solar System (eccentricity ~0.9875). |
High-inclination | |||
Name | Inclination | Discovery date | Comment |
(5496) 1973 NA | 67.999° | July 4, 1973 | A Mars-crosser and Near-Earth object. |
2001 AU43 | 72.132° | January 4, 2001 | A Mars-crosser and Near-Earth object. |
2002 XU93 | 77.904° | December 4, 2002 | A damocloid and SDO. It is almost an Uranus outer-grazer. |
2003 EH1 | 70.790° | March 6, 2003 | A Mars-crosser, Near-Earth object and Jupiter inner-grazer. |
2004 LG | 70.725° | June 9, 2004 | A Mercury- through Mars-crosser and Near-Earth object. |
[edit] Some other noteworthy asteroids (within the orbit of Jupiter)
Name | Diameter (km) | Discovered | Comment |
---|---|---|---|
5 Astraea | 117 | December 8, 1845 | First asteroid discovered 38 years after original four |
61 Danaë | 82 | September 9, 1860 | First asteroid to have a non-ASCII name |
62 Erato | 95 | September 14, 1860 | First asteroid to be co-discovered by two people |
85 Io | 155 | September 19, 1865 | Asteroid with the shortest name (two characters, plus a two-digit number) (runners up: 954 Li, 1714 Sy, 2705 Wu, 3271 Ul, 6498 Ko, and 22260 Ur) |
87 Sylvia | 261 | May 16, 1866 | First asteroid known to have more than one moon |
90 Antiope | 80×80 | October 1, 1866 | Double asteroid with two nearly equal components; its double nature was discovered using adaptive optics |
92 Undina | 126 | 1867 July 7 | Created in one of the largest asteroid-on-asteroid collisions of the past 100 million years |
139 Juewa | 162 | October 10, 1874 | First asteroid discovered in China, by James Craig Watson. The name was chosen by Chinese officials: 瑞華, or in modern pinyin, ruìhuá |
216 Kleopatra | 217×94 | April 10, 1880 | Metallic asteroid with "dog-bone" shape |
243 Ida | 56×24×21 | September 29, 1884 | First confirmed binary asteroid |
(243) Ida I Dactyl | 1.4 | February 17, 1994 | Moon of 243 Ida, first confirmed satellite of an asteroid |
288 Glauke | 32 | February 20, 1890 | Exceptionally slow rotation period of about 1200 hours (2 months) |
323 Brucia | 36 | December 22, 1891 | First asteroid discovered by means of astrophotography rather than visual observation |
333 Badenia | 78 | August 22, 1892 | First asteroid to first receive a provisional designation (1892A) |
433 Eros | 13×13×33 | August 13, 1898 | First near-Earth asteroid discovered and the second largest |
490 Veritas | 115 | 1902 September 3 | Created in one of the largest asteroid-on-asteroid collisions of the past 100 million years |
624 Hektor | 370×195 | February 10, 1907 | Largest Jovian Trojan asteroid discovered |
719 Albert | 2.4 | October 3, 1911 | Last numbered asteroid to be lost then recovered |
944 Hidalgo | 20 | October 31, 1920 | Longest orbital period of any asteroid in the main asteroid belt |
1125 China | October 30, 1957 | First asteroid discovery to be credited to an institution rather than a person | |
1566 Icarus | 1.4 | June 27, 1949 | Apollo class asteroid; perihelion is closer to the Sun than Mercury |
1743 Schmidt | 17 | September 24, 1960 | First asteroid to be co-discovered by three people |
2063 Bacchus | 1.1×1.1×2.6 | April 24, 1977 | |
3200 Phaethon | 5 | October 11, 1983 | First asteroid discovered from space; source of Geminids meteor shower. |
3753 Cruithne | 5 | October 10, 1986 | Unusual Earth-associated orbit |
4015 Wilson-Harrington | November 19, 1949 | Longest-named asteroid (17 characters) | |
4090 Říšehvězd | September 2, 1986 | Name with the most diacritics (four) | |
4179 Toutatis | 4.5×2.4×1.9 | January 4, 1989 | Closely approached Earth on September 29th, 2004 |
4769 Castalia | 1.8×0.8 | August 9, 1989 | First asteroid to be imaged |
5261 Eureka | ~2–4 | June 20, 1990 | First Martian Trojan asteroid (L5 point) discovered (not yet officially recognized as such) |
(11885) 1990 SS | September 25, 1990 | First automated discovery of a Near-Earth Object (NEO) | |
(29075) 1950 DA | 1.1 | February 23, 1950 | Will approach Earth very closely in 2880 |
99942 Apophis | 0.3 | June 19, 2004 | First asteroid to rank greater than one on the Torino Scale (it was ranked at 2, then 4; now down to 0). Previously better known by its provisional designation 2004 MN4. |
1997 XR2 | 0.23 | 1997 | First asteroid to rank greater than zero on the impact-risk Torino Scale (it's ranked 1) |
1998 KY26 | 0.030 | June 2, 1998 | Approached within 800,000 km of Earth |
2002 AA29 | 0.1 | January 9, 2002 | Unusual Earth-associated orbit |
2004 FH | 0.030 | 2004 | Discovered before it approached within 43,000 km of Earth on March 18, 2004. |
2004 JG6 | 0.5–1 | May 10, 2004 | Six-month orbital period is second shortest, second only to Mercury |
[edit] Spacecraft targets
Name | Diameter (km) | Discovered | Spacecraft |
---|---|---|---|
1 Ceres | 959×933 | January 1, 1801 | Target of the Dawn spacecraft |
4 Vesta | 468 | March 29, 1807 | Target of the Dawn spacecraft |
21 Lutetia | 120×100×80 | November 15, 1852 | Target of the Rosetta probe |
140 Siwa | 103 | October 13, 1874 | Abandoned target of the Rosetta probe |
243 Ida | 56×24×21 | September 29, 1884 | Visited by Galileo spacecraft - See also Dactyl (moon) |
253 Mathilde | 66×48×46 | November 12, 1885 | Visited by NEAR Shoemaker |
433 Eros | 13×13×33 | August 13, 1898 | First asteroid studied from orbit (NEAR Shoemaker, 2000-01) |
951 Gaspra | 18.2×10.5×8.9 | July 30, 1916 | First asteroid visited by spacecraft (Galileo, 1991) |
1620 Geographos | 5.1×1.8 | September 14, 1951 | Was the target of Clementine spacecraft |
2530 Shipka | July 9, 1978 | Abandoned target of the Rosetta probe | |
2685 Masursky | 15-20 | May 3, 1981 | Distant observations by the Cassini spacecraft |
2703 Rodari | March 29, 1979 | Abandoned target of the Rosetta probe | |
2867 Šteins | 4.6 | November 4, 1969 | Target of the Rosetta probe |
3352 McAuliffe | 2-5 | February 6, 1981 | Abandoned target of the Deep Space 1 probe |
3840 Mimistrobell | October 9, 1980 | Abandoned target of the Rosetta probe | |
4660 Nereus | ~1 | February 28, 1982 | Target of the cancelled NEAP probe and abandoned target of the Hayabusa mission |
4979 Otawara | 5.5 | August 2, 1949 | Abandoned target of the Rosetta probe |
5535 Annefrank | 4.0 | March 23, 1942 | Target of the Stardust probe |
9969 Braille | 2.2×0.6 | May 27, 1992 | Target of the Deep Space 1 probe |
25143 Itokawa | ~1 | September 26, 1998 | Target of the Hayabusa sample return mission |
2002 JF56 | ~2.5 | June 13, 2006 | Visited by New Horizons probe |
[edit] Minor planets with the same or similar names as moons
Name | Namesake | Moon of |
---|---|---|
9 Metis | Metis | Jupiter |
17 Thetis | Tethys | Saturn |
24 Themis | Themis | Saturn (spurious) |
38 Leda | Leda | Jupiter |
52 Europa | Europa | Jupiter |
53 Kalypso | Calypso | Saturn |
55 Pandora | Pandora | Saturn |
74 Galatea | Galatea | Neptune |
85 Io | Io | Jupiter |
101 Helena | Helene | Saturn |
106 Dione | Dione | Saturn |
113 Amalthea | Amalthea | Jupiter |
171 Ophelia | Ophelia | Uranus |
204 Kallisto | Callisto | Jupiter |
218 Bianca | Bianca | Uranus |
239 Adrastea | Adrastea | Jupiter |
302 Clarissa | Larissa | Neptune |
548 Kressida | Cressida | Uranus |
558 Carmen | Carme | Jupiter |
577 Rhea | Rhea | Saturn |
593 Titania | Titania | Uranus |
666 Desdemona | Desdemona | Uranus |
900 Rosalinde | Rosalind | Uranus |
1036 Ganymed | Ganymede | Jupiter |
1162 Larissa | Larissa | Neptune |
1285 Julietta | Juliet | Uranus |
1809 Prometheus | Prometheus | Saturn |
1810 Epimetheus | Epimetheus | Saturn |
2758 Cordelia | Cordelia | Uranus |
2060 Chiron | Charon | Pluto |
3908 Nyx | Nix | Pluto |
4450 Pan | Pan | Saturn |
9313 Protea | Proteus | Neptune |
21290 Vydra | Hydra | Pluto |
[edit] Numbered minor planets that are also comets
Name | Cometary name | Comment |
---|---|---|
2060 Chiron | 95P/Chiron | Discovered in 1977 as the first Centaur, later found to display cometary behavior (including a coma) |
4015 Wilson-Harrington | 107P/Wilson-Harrington | In 1992, it was realized that asteroid 1979VA's orbit matched it with the positions of the lost comet Wilson-Harrington (1949 III) |
7968 Elst-Pizarro | 133P/Elst-Pizarro | Discovered in 1996 as a comet, but orbitally matched to asteroid 1979 OW7 |
60558 Echeclus | 174P/Echeclus | Second Centaur found to have a coma |
118401 LINEAR | 176P (1999 RE70) | main-belt comet-asteroid discovered to have a coma on November 26, 2005 |
Note there are a quite a few other cases where a non-numbered asteroid with only a systematic designation (such as 2001 OG108) turned out to be a comet. The above table lists only numbered asteroids that are also comets.
[edit] Minor planets that were misnamed and renamed
In earlier times, before the modern numbering and naming rules were in effect, asteroids were sometimes given numbers and names before their orbits were precisely known. And in a few cases duplicate names were given to the same object (with modern use of computers to calculate and compare orbits with old recorded positions, this type of error no longer occurs). This led to a few cases where asteroids had to be renamed. [1]
- 330 Adalberta
- An object discovered March 18, 1892 by Max Wolf with provisional designation "1892 X" was named 330 Adalberta, but was lost and never recovered. In 1982 it was determined that the observations leading to the designation of 1892 X were stars, and the object never existed. The name and number 330 Adalberta was then reused for another asteroid discovered by Max Wolf on February 2, 1910, which had the provisional designation A910 CB.
- 525 Adelaide
- The object A904 EB discovered March 14, 1904 by Max Wolf was named 525 Adelaide and was subsequently lost. Later, the object 1930 TA discovered October 3, 1930 by Sylvain Arend was named 1171 Rusthawelia. In those pre-computer days, it was not realized until 1958 that these were one and the same object. The name Rusthawelia was kept (and discovery credited to Arend); the name 525 Adelaide was reused for the object 1908 EKa discovered October 21, 1908 by Joel Hastings Metcalf.
- 715 Transvaalia and 933 Susi
- The object 1911 LX discovered April 22, 1911 by H. E. Wood was named 715 Transvaalia. On April 23, 1920, the object 1920 GZ was discovered and named 933 Susi. In 1928 it was realized that these were one and the same object. The name Transvaalia was kept, and the name and number 933 Susi was reused for the object 1927 CH discovered February 10, 1927 by Karl Reinmuth.
- 864 Aase and 1078 Mentha
- The object A917 CB discovered February 13, 1917 by Max Wolf was named 864 Aase, and the object 1926 XB discovered December 7, 1926 by Karl Reinmuth was named 1078 Mentha. In 1958 it was discovered that these were one and the same object. In 1974, this was resolved by keeping the name 1078 Mentha and reusing the name and number 864 Aase for the object 1921 KE, discovered September 30, 1921 by Karl Reinmuth.
- 1095 Tulipa and 1449 Virtanen
- The object 1928 DC discovered February 24, 1928 by Karl Reinmuth was named 1095 Tulipa, and the object 1938 DO discovered February 20, 1938 by Yrjö Väisälä was named 1449 Virtanen. In 1966 it was discovered that these were one and the same object. The name 1449 Virtanen was kept and the name and number 1095 Tulipa was reused for the object 1926 GS discovered April 14, 1926 by Karl Reinmuth.
- 1125 China and 3789 Zhongguo
- The object 1928 UF discovered October 25, 1928 by Zhang Yuzhe (Y. C. Chang) was named 1125 China, and was later lost. Later, the object 1957 UN1 was discovered on October 30, 1957 at Purple Mountain Observatory and was initially incorrectly believed to be the rediscovery of the object 1928 UF. The name and number 1125 China were then reused for the object 1957 UN1, and 1928 UF remained lost. In 1986, the object 1986 QK1 was discovered and proved to be the real rediscovery of 1928 UF. This object was given the new number and name 3789 Zhongguo. Note Zhongguo is the Mandarin Chinese word for "China", in pinyin transliteration.
- Asteroid 1317
- The object 1914 UQ discovered April 20, 1914 by G. N. Neujmin was named 787 Moskva (and retains that name to this day). The object 1934 FD discovered on March 19, 1934 by C. Jackson was given the sequence number 1317. In 1938, G. N. Neujmin found that asteroid 1317 and 787 Moskva were one and the same object. The sequence number 1317 was later reused for the object 1935 RC discovered on September 1, 1935 by Karl Reinmuth; that object is now known as 1317 Silvretta.
[edit] Record-setting close approaches to Earth
Only asteroids or meteoroids that break a previous record are included. Note that near-earth object detection technology drastically improved around the turn of the century, so objects being detected as of 2004 would have been missed only a decade earlier. By some definitions, an asteroid must be at least 50 meters in diameter, accordingly the table lists objects smaller than this size separately.
Distance (AU) |
Distance Mm |
Size (m) (approximate) |
Date of closest approach |
Object |
---|---|---|---|---|
0.000043 | 6 | radius of Earth | ||
Objects below 50 m size (Meteoroids) | ||||
0.000086 | 13 | 6 | 2004 March 31 | 2004 FU162 |
0.00033 | 49 | 30 | 2004 March 18 | 2004 FH |
0.00056 | 84 | 5 | 2003 September 27 | 2003 SQ222 |
0.00072 | 108 | 15 | 1994 December 9 | 1994 XM1 |
0.00099 | 148 | 5 | 1993 May 20 | 1993 KA2 |
0.00114 | 171 | 10 | 1991 January 18 | 1991 BA |
0.00257 | 386 | average distance to the Moon | ||
Objects above 50 m size (Asteroids) | ||||
0.00289 | 432 | 500 | 2006 July 3 | 2004 XP14 |
0.00457 | 684 | 300 | 1989 March 22 | 4581 Asclepius |
0.00495 | 741 | 300 & 300 | 1937 October 30 | 69230 Hermes |
See also: Closest Approaches to the Earth by Minor Planets
[edit] Exceptionally slow-rotating objects
Rotation periods have been determined for only a small fraction of asteroids (from light curves or from radar studies). Most asteroids have rotation periods of less than 24 hours; however, 288 Glauke has a rotation period of about 50 days.
Name | Rotation period (hours) |
---|---|
288 Glauke | 1200 |
1220 Crocus | 737 |
253 Mathilde | 417.7 |
1998 QR52 | 234 |
3691 Bede | 226.8 |
9969 Braille | 226.4 |
(38071) 1999 GU3 | 216 |
(65407) 2002 RP120 | 200 |
See also: Minor Planet Lightcurve Parameters
[edit] See also
- List of solar system objects by mass
- List of numbered Aten asteroids
- List of asteroids named after people
- List of asteroids named after places
- List of Apollo asteroids
- List of Amor asteroids
- List of Centaurs
- List of scattered-disk objects
- List of asteroids with moons
- List of Mercury-crossing asteroids
- List of Venus-crossing asteroids
- List of Earth-crossing asteroids
- List of Mars-crossing asteroids
- List of Jupiter-crossing asteroids
- List of Saturn-crossing asteroids
- List of Uranus-crossing asteroids
- List of Neptune-crossing asteroids
[edit] External links
- Lists and plots: Minor Planets
- PDS Asteroid Data Archive
- SBN Small Bodies Data Archive
- NASA Near Earth Object Program
- Major News About Minor Objects
[edit] Books
Dictionary of Minor Planet Names, 5th ed.: Prepared on Behalf of Commission 20 Under the Auspices of the International Astronomical Union, Lutz D. Schmadel, ISBN 3-540-00238-3