| 25143 Itokawa (1998 SF36) |
| Classification: Apollo [NEO, PHA] SPK-ID: 2025143 |
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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 196 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2801166461882852 | 1.2712e-09 | |
| a | 1.324118017407799 | 1.9984e-09 | au |
| q | .9532105192140452 | 3.0674e-09 | au |
| i | 1.621303507642802 | 1.9412e-07 | deg |
| node | 69.0803904880264 | 4.936e-06 | deg |
| peri | 162.8147699851312 | 4.9678e-06 | deg |
| M | 187.6327516838828 | 9.0457e-06 | deg |
| tp | 2459266.965334079487
(2021-Feb-21.46533408) | 1.4587e-05 | TDB |
| period | 556.5298582285585
1.52 | 1.2599e-06
3.449e-09 | d
yr |
| n | .6468655628754305 | 1.4644e-09 | deg/d |
| Q | 1.695025515601553 | 2.5582e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
19.2 |
|
n/a |
PDS3 (MPO 12525) |
|
| diameter |
diameter |
0.33 |
km |
n/a |
Science 312:1330-1334 |
based on a spheroid of equivalent volume: 1.84e7 m^3 |
| extent |
extent |
0.535x0.294x0.209 |
km |
0.001 |
Science 312:1330-1334 |
|
| GM |
GM |
2.1e-9 |
km^3/s^2 |
0.063e-9 |
Science 312:1330-1334 |
derived from published mass of 3.51e10 kg +/- 3% |
| bulk density |
density |
1.9 |
g/cm^3 |
0.13 |
Science 312:1330-1334 |
Porosity 41% |
| rotation period |
rot_per |
12.132 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Lambert, J.S.; Tholen, D.J. (2001) Bull. Amer. Astron. Soc. 33, 1402.]
[Lowry, S.C.; Weissman, P.R.; Hicks, M.D. (2001) Bull. Amer. Astron. Soc. 33, 1150.]
[Dermawan, B.; Nakamura, T.; Fukushima, H.; Sato, H.; et al. (2002) Pub. Astron. Soc. Japan 54, 635-640.]
[Kaasalainen, M.; et al. (2003) Astron. Astrophys. 405, L29-L32.]
[Ohba, Y.; Abe, M.; Hasagawa, S.; Ishiguro, M.; et al. (2005) Earth Planets Space 55, 341-347.]
[Warner, B.D. (2004) Minor Planet Bull. 31, 67-70.]
[Lowry, S.; Weissman, P.R.; Hicks, M.D.; Whiteley, R.J.; Larson, S. (2005) Icarus 176, 408-417.]
[Nishihara, S.; Abe, M.; Hasagawa, S.; Ishiguro, M.; et al. (2005) Lunar & Planetary Sci. XXXVI, 1833.]
[Durech, J.; Vokrouhlicky, D.; Kaasalainen, M.; Weissman, P.; et al. (2008) Astron. Astrophys. 488, 345-350.]
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm]
[Nishihara, S.; Kitzato, K.; Abe, M.; Hasegawa, S.; et al. (2018) ArXiv:2018.80202742.] |
| SMASSII spectral type |
spec_B |
S(IV) |
|
n/a |
Binzel et al. (2001) Planet. Sci. 36, 1167-1172 |
|
|
| 25143 Itokawa | Discovered 1998 Sept. 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. |
| Hideo Itokawa (1912-1999) is regarded as the Father of Japanese rocketry. An aerospace engineer, Itokawa initiated Japan's first launch tests of the solid rocket series called "Pencil" in 1955. Under his unique vision and strong leadership, his rockets reached space by 1960 and put Japan's first satellite into orbit in 1970. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20030806/MPCPages.arc | Last Updated: 2003-10-02 |
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