28978 Ixion facts for kids

Kids Encyclopedia Facts
28978 Ixion
28978 Ixion
Discovery
Discovered by Deep Ecliptic Survey
Discovery date 22 May, 2001
Names
Name 28978 Ixion
Other names 2001 KX76
Category TNO (plutino)
Orbit
Reference date December 31, 2006 (JD 2 454 100.5)
Longest distance from the Sun 7 370.503 Gm (49.269 AU)
Shortest distance from the Sun 4 501.495 Gm (30.091 AU)
Longest distance from the center of its orbital path
("semi-major axis")
5 935.999 Gm (39.680 AU)
How long it takes to complete an orbit 91 295.847 d (249.95 a)
Average speed 4.66 km/s
Mean anomaly 268.546°
Angle above the reference plane
("inclination")
19.584°
Size and other qualities
Measurements ~650+260−220
< 822 km diameter
Surface area < 2.24×106 km²
Volume < 3.15×108 km³
Mass ≈3×1020? kg
Average density 2.0? g/cm³
Surface gravity < 0.229 7? m/s²
Escape velocity < 0.434 6? km/s
Rotation period ? d
How much light it reflects 0.15-0.37
Avg. surface temp. ≈44 K
Spectral type (moderately red; B-V=1.03, V-R=0.61)
Seeming brightness
("apparent magnitude")
19.6 (opposition)
True brightness
("absolute magnitude")
3.2

28978 Ixion is a Kuiper belt object that was found on May 22, 2001. Ixion is a plutino (an object that has a 2:3 orbital resonance with Neptune) and could be a dwarf planet. Astronomers think that it has a diameter of about 800 km, which makes it the third biggest plutino. It is named after Ixion, a figure from Greek mythology. Before it was named Ixion, it had the provisional designation 2001 KX76.


28978 Ixion Facts for Kids. Kiddle Encyclopedia.