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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1397256492040917 | 2.946e-08 | |
| a | 2.893036058184865 | 1.4014e-08 | au |
| q | 2.488804716784138 | 8.3913e-08 | au |
| i | 14.26888782520679 | 3.8211e-06 | deg |
| node | 180.8393982209862 | 1.3498e-05 | deg |
| peri | 266.268207116762 | 1.9242e-05 | deg |
| M | 265.1512163773289 | 1.5686e-05 | deg |
| tp | 2459870.041953878175
(2022-Oct-17.54195388) | 7.9774e-05 | TDB |
| period | 1797.335684075083
4.92 | 1.3059e-05
3.575e-08 | d
yr |
| n | .2002964739362295 | 1.4553e-09 | deg/d |
| Q | 3.297267399585591 | 1.5972e-08 | au |
|
| | 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 |
11.07 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
40.373 |
km |
0.706 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| rotation period |
rot_per |
11.874 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Oey, J. (2011) http://minorplanet.haoeydental.com.au]
[Stephens, R.D.; Warner, B.D. (2019) Minor Planet Bull. 46, 449-456.] |
| geometric albedo |
albedo |
0.057 |
|
0.004 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| SMASSII spectral type |
spec_B |
Cgh |
|
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) |
|
| 2378 Pannekoek (1935 CY) Discovered 1935-Feb-13 by Van Gent, H. at Johannesburg (LS) |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| 1935 CY = 1935 EP = 1938 UD1 = 1960 HD = 1967 RB1 = 1970 GP1 = 1970 JG = 1972 RH3 = 1975 JH = 1977 RR5 = 1977 XJ = A918 RE |
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