4946 Askalaphus (1988 BW1) |
Classification: Jupiter Trojan SPK-ID: 2004946 |
[ hide orbit diagram ]
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.
[ revert to old Java-based viewer ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .05027992788117809 | 5.3786e-08 | |
a | 5.317589463215864 | 9.6598e-08 | au |
q | 5.050221448503658 | 2.7879e-07 | au |
i | 21.86055699353075 | 6.0284e-06 | deg |
node | 59.02990218021659 | 1.5744e-05 | deg |
peri | 205.8504644680892 | 7.3915e-05 | deg |
M | 52.10200745420226 | 6.9217e-05 | deg |
tp | 2457952.279755057930 (2017-Jul-17.77975506) | 0.00086522 | TDB |
period | 4478.892456960866 12.26 | 0.00012204 3.341e-07 | d yr |
n | .08037701361650387 | 2.1902e-09 | deg/d |
Q | 5.58495747792807 | 1.0146e-07 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ hide covariance matrix ]
Orbital Elements at Epoch 2456461.5 (2013-Jun-18.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .04932017322743031 | 5.3743e-08 | |
q | 5.058962388656267 | 2.7667e-07 | au |
tp | 2457932.050675390851 (2017-Jun-27.55067539) | 0.00088615 | TDB |
node | 59.0540468042766 | 1.5742e-05 | deg |
peri | 203.8359283538046 | 7.5563e-05 | deg |
i | 21.85727496974848 | 6.028e-06 | deg |
|
| | Orbit Determination Parameters
Additional Information
|
Orbit Covariance (6×6)
|
|
e |
q |
tp |
node |
peri |
i |
e |
2.888324496002379E-15 |
-1.404572298936452E-14 |
-1.918136441158064E-12 |
-6.427799452752413E-16 |
-9.278928260038899E-14 |
-4.93351607881324E-16 |
q |
-1.404572298936452E-14 |
7.65441632307292E-14 |
-9.926242206985684E-12 |
5.010208095298958E-15 |
-1.426848595732091E-12 |
4.610462395631254E-15 |
tp |
-1.918136441158064E-12 |
-9.926242206985684E-12 |
7.852595435183803E-7 |
1.122207872350439E-10 |
6.552861846803125E-8 |
1.269989758048298E-11 |
node |
-6.427799452752413E-16 |
5.010208095298958E-15 |
1.122207872350439E-10 |
2.477970528944301E-10 |
-2.205570510006732E-10 |
-1.990282156112134E-11 |
peri |
-9.278928260038899E-14 |
-1.426848595732091E-12 |
6.552861846803125E-8 |
-2.205570510006732E-10 |
5.709751928632711E-9 |
1.948447704191373E-11 |
i |
-4.93351607881324E-16 |
4.610462395631254E-15 |
1.269989758048298E-11 |
-1.990282156112134E-11 |
1.948447704191373E-11 |
3.633651169114184E-11 |
|
Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
10.2 |
|
n/a |
MPO384798 |
|
diameter |
diameter |
48.209 |
km |
0.430 |
urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G) |
|
rotation period |
rot_per |
22.731 |
h |
n/a |
LCDB (Rev. 2019-January); Warner et al., 2009 |
Published Reference List: [Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.] |
geometric albedo |
albedo |
0.069 |
|
0.008 |
urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G) |
|
|
4946 Askalaphus (1988 BW1) Discovered 1988-Jan-21 by Shoemaker, C. S. at Palomar |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
|