| 2340 Hathor (1976 UA) |
| Classification: Aten [NEO, PHA] SPK-ID: 2002340 |
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| Orbit Diagram
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| Note:
Make sure you have Java enabled on your browser to see the applet.
This applet is provided as a 3D orbit visualization tool.
The applet was implemented using 2-body methods,
and hence should not be used for determining accurate long-term trajectories
(over several years or decades) or planetary encounter circumstances.
For accurate long-term ephemerides, please instead use our Horizons system. |
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Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.
Orbit Viewer applet originally written and kindly provided by
Osamu Ajiki (AstroArts),
and further modified by
Ron Baalke (JPL).
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Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .4498427208488246 | 1.7033e-07 | |
| a | .8442304480874677 | 4.3174e-10 | AU |
| q | .4644595262963788 | 1.4367e-07 | AU |
| i | 5.854267230354686 | 9.2568e-06 | deg |
| node | 211.4663976004391 | 2.9065e-05 | deg |
| peri | 40.01184820207784 | 2.9793e-05 | deg |
| M | 113.4940812056478 | 4.4848e-05 | deg |
| tp | 2456311.177543856885
(2013-Jan-18.67754386) | 3.5272e-05 | JED |
| period | 283.3282922768082
0.78 | 2.1734e-07
5.95e-10 | d
yr |
| n | 1.270610841956738 | 9.7468e-10 | deg/d |
| Q | 1.224001369878557 | 6.2595e-10 | AU |
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| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
19.2 |
mag |
n/a |
PDS3 (MPC 28108) |
|
| diameter |
diameter |
0.3 |
km |
n/a |
Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 |
based on assumed medium albedo (0.15) |
| B-V |
BV |
.770 |
mag |
.020 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 |
#obs=1; phase=32.11 deg. |
| U-B |
UB |
.500 |
mag |
.042 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 |
#obs=1; phase=32.11 deg. |
| Tholen spectral type |
spec_T |
CSU |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
| SMASSII spectral type |
spec_B |
Sq |
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n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) |
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| 2340 Hathor | Discovered 1976 Oct. 22 by C. Kowal at Palomar. |
| Like the other objects of Aten type, (2340) is named for an Egyptian deity. Known as a sky-goddess and the daughter of Ra, Hathor was also identified with Aphrodite. Name proposed by E. Helin, who made an independent discovery of the object and who also made crucial recovery observations in 1981. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: MPC 6060 | Last Updated: 2006-03-21 |
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[ show close-approach data ]
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