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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.
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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .07406998068717223 | 4.0695e-08 | |
| a | 3.373861223791939 | 1.457e-08 | au |
| q | 3.123959388104471 | 1.4268e-07 | au |
| i | 4.669318179853406 | 4.444e-06 | deg |
| node | 205.960019117547 | 4.8615e-05 | deg |
| peri | 175.3661186824971 | 5.5539e-05 | deg |
| M | 32.68466043215955 | 2.6277e-05 | deg |
| tp | 2458794.991056880395
(2019-Nov-07.49105688) | 0.00016519 | TDB |
| period | 2263.545606558086
6.20 | 1.4662e-05
4.014e-08 | d
yr |
| n | .1590425211477893 | 1.0302e-09 | deg/d |
| Q | 3.623763059479407 | 1.5649e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Orbital Elements at Epoch 2455809.5 (2011-Sep-05.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .0687761539307036 | 3.9278e-08 | |
| q | 3.143671261281524 | 1.3625e-07 | au |
| tp | 2456489.589530487984
(2013-Jul-16.08953049) | 0.00018527 | TDB |
| node | 206.4281871191704 | 4.9131e-05 | deg |
| peri | 168.8773818714217 | 5.7439e-05 | deg |
| i | 4.636272698047123 | 4.4257e-06 | deg |
|
| | Orbit Determination Parameters
Additional Information
|
Orbit Covariance (6×6)
|
| |
e |
q |
tp |
node |
peri |
i |
| e |
1.542763259341109E-15 |
-5.327786556685604E-15 |
3.362872197427079E-13 |
3.510602557388981E-15 |
6.110298782832633E-14 |
5.016104933705488E-17 |
| q |
-5.327786556685604E-15 |
1.856293623110179E-14 |
-1.084688238848944E-12 |
-3.110148568111511E-15 |
-2.174587939006278E-13 |
9.539465737907132E-16 |
| tp |
3.362872197427079E-13 |
-1.084688238848944E-12 |
3.43235341938032E-8 |
3.500214340649083E-12 |
5.52852932470508E-9 |
3.171649265845064E-12 |
| node |
3.510602557388981E-15 |
-3.110148568111511E-15 |
3.500214340649083E-12 |
2.413853846197547E-9 |
-2.405880063978472E-9 |
-3.492747699043031E-12 |
| peri |
6.110298782832633E-14 |
-2.174587939006278E-13 |
5.52852932470508E-9 |
-2.405880063978472E-9 |
3.299214111457652E-9 |
3.840049197658078E-12 |
| i |
5.016104933705488E-17 |
9.539465737907132E-16 |
3.171649265845064E-12 |
-3.492747699043031E-12 |
3.840049197658078E-12 |
1.958724061251341E-11 |
|
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.1 |
|
n/a |
MPO502154 |
IRAS observations used: 6 |
| diameter |
diameter |
145.366 |
km |
3.219 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
47.009 |
h |
n/a |
LCDB (Rev. 2019-August); Warner et al., 2009 |
Published Reference List:
[Pilcher, F.; Benishek, V.; Brinsfield, J.W. (2008) Minor Planet Bull. 35, 104-105.] |
| geometric albedo |
albedo |
0.056 |
|
0.012 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| B-V |
BV |
0.745 |
|
0.013 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=5; phase (min.=1.40, mean=7.89, max.=17.63) deg. |
| U-B |
UB |
0.384 |
|
0.027 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=5; phase (min.=1.68, mean=11.14, max.=17.66) deg. |
| Tholen spectral type |
spec_T |
C |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
Ch |
|
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) |
|
| 168 Sibylla (A876 SA) Discovered 1876-Sep-28 by Watson, J. C. at Ann Arbor |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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Alternate Designations
| A876 SA = 1949 MO = A911 HF |
|
|
