4769 Castalia (1989 PB) |
Classification: Apollo [NEO, PHA] SPK-ID: 2004769 |
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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 89 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .4832130534500551 | 4.1569e-08 | |
a | 1.063180454705304 | 3.3222e-10 | au |
q | .5494377808187361 | 4.406e-08 | au |
i | 8.885505892348467 | 7.6662e-06 | deg |
node | 325.5403740364774 | 1.3244e-05 | deg |
peri | 121.4100756688546 | 1.3505e-05 | deg |
M | 145.3860902093294 | 3.8834e-06 | deg |
tp | 2459038.792836365268 (2020-Jul-08.29283637) | 4.3298e-06 | TDB |
period | 400.4136766088491 1.10 | 1.8768e-07 5.138e-10 | d yr |
n | .8990701892325025 | 4.214e-10 | deg/d |
Q | 1.576923128591872 | 4.9275e-10 | au |
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| | Orbit Determination Parameters
Additional Information
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Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
16.9 |
|
n/a |
PDS3 (MPC 17949) |
|
diameter |
diameter |
1.4 |
km |
n/a |
Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 |
based on assumed medium albedo (0.15) |
rotation period |
rot_per |
4.095 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Ostro, S.J.; Chandler, J.F.; Hine, A.A.; Rosema, K.D.; et al. (1990) Science 248, 1523-1528.] [Hudson, R.S.; Ostro, S.J.; Harris, A.W. (1997) Icarus 130, 165-176.] |
geometric albedo |
albedo |
0.092 |
|
0.014 |
urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2017AJ....154..168M) |
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4769 Castalia (1989 PB) Discovered 1989-Aug-09 by Helin, E. F. at Palomar |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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