|Discovered by||Eleanor F. Helin|
|Discovery date||2 August 1986|
|Epoch 26 January 2011 (JD 2455587.5)|
|Uncertainty parameter 0|
|Observation arc||10565 days (28.93 yr)|
|Aphelion||1.5300 AU (228.88 Gm)|
|Perihelion||0.58927 AU (88.154 Gm)|
|1.0597 AU (158.53 Gm)|
|1.09 yr (398.42 d)|
|0° 54m 12.816s / day|
|Earth MOID||0.0192758 AU (2.88362 Gm)|
|Jupiter MOID||3.68865 AU (551.814 Gm)|
|Jupiter Tisserand parameter||5.704|
4034 Vishnu (provisional designation: 1986 PA) is an Apollo asteroid, 0.4 kilometers in diameter. It completes one revolution around the Sun almost once every year. It was discovered by Eleanor F. Helin at the Palomar Observatory in San Diego County, California on August 2, 1986. It is an O-type asteroid, meaning it is similar to the asteroid 3628 Boznemcová, which is the best asteroid match to the spectra of L6 and LL6 ordinary chondrite meteorites. L and LL chondrites have lower iron and metal content, but higher iron oxide content in the silicates.
Its highly eccentric orbit crosses the orbits of Venus, Earth, and Mars. From 1800 to 2200 the asteroid passes within 30 Gm of Venus 71 times, Earth 29 times, and Mars 7 times.
- "JPL Small-Body Database Browser: 4034 Vishnu (1986 PA)". Retrieved 14 April 2016.
- 4034 Vishnu at the JPL Small-Body Database
|This Mars-crosser asteroid-related article is a stub. You can help Wikipedia by expanding it.|