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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 82 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1552142885704066 | 1.6928e-08 | |
| a | 2.449547116334105 | 4.868e-09 | au |
| q | 2.069342403352616 | 4.1772e-08 | au |
| i | 1.816435438258776 | 8.8028e-07 | deg |
| node | 23.13544784317337 | 4.3581e-05 | deg |
| peri | 333.232081970432 | 4.5594e-05 | deg |
| M | 7.669646664461634 | 9.939e-06 | deg |
| tp | 2459366.666790427857
(2021-Jun-01.16679043) | 3.8633e-05 | TDB |
| period | 1400.319456140859
3.83 | 4.1743e-06
1.143e-08 | d
yr |
| n | .25708419491087 | 7.6636e-10 | deg/d |
| Q | 2.829751829315595 | 5.6236e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
10.42 |
|
n/a |
E2021B10 |
IRAS observations used: 6 |
| diameter |
diameter |
34.792 |
km |
0.575 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
4.623 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Barucci, M.A.; Di Martino, M.; Fulchignoni, M. (1992) Astron. J. 103, 1679-1686.]
[Piironen, J.; Lagerkvist, C.-I.; Erikson, A.; Oja, T.; et al. (1998) Astron. Astrophys. Suppl. Ser. 128, 525-540.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
[Lang, K.; Jacobsen, J.; Kristensen, L.H.; Larsen, F.R. (2018) Minor Planet Bull. 45, 197-198.]
[Dose, E.V. (2020) Minor Planet Bull. 47, 324-330.] |
| geometric albedo |
albedo |
0.118 |
|
0.017 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.709 |
|
0.028 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=7.29, mean=7.98, max.=8.56) deg. |
| U-B |
UB |
0.280 |
|
0.082 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=7.29, mean=7.98, max.=8.56) deg. |
| Tholen spectral type |
spec_T |
DCX |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
|
| 435 Ella (A898 RA) Discovered 1898-Sep-11 by Wolf, M. and Schwassmann, A. at Heidelberg |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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