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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1096037100521228 | 1.0822e-08 | |
| a | 2.356815242723064 | 5.3747e-09 | au |
| q | 2.098499548213222 | 2.4924e-08 | au |
| i | 4.068042821409309 | 5.6321e-07 | deg |
| node | 81.71803101611555 | 8.1157e-06 | deg |
| peri | 97.43600928721618 | 9.856e-06 | deg |
| M | 202.2739362940531 | 5.1389e-06 | deg |
| tp | 2459779.512178634328
(2022-Jul-19.01217863) | 1.984e-05 | TDB |
| period | 1321.559540704489
3.62 | 4.5207e-06
1.238e-08 | d
yr |
| n | .2724054338165448 | 9.3183e-10 | deg/d |
| Q | 2.615130937232906 | 5.9638e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ hide covariance matrix ]
Orbital Elements at Epoch 2457121.5 (2015-Apr-09.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1088164696638256 | 1.0814e-08 | |
| q | 2.101209728672035 | 2.4906e-08 | au |
| tp | 2457134.548008746353
(2015-Apr-22.04800875) | 1.7026e-05 | TDB |
| node | 81.74380744788797 | 8.111e-06 | deg |
| peri | 97.25447089978195 | 9.8709e-06 | deg |
| i | 4.068886464822975 | 5.6323e-07 | deg |
|
| | Orbit Determination Parameters
Additional Information
|
Orbit Covariance (6×6)
|
| |
e |
q |
tp |
node |
peri |
i |
| e |
1.169521600623441E-16 |
-2.645273935039065E-16 |
-9.19226050862577E-14 |
-1.933144711035429E-14 |
-9.34967743121493E-15 |
1.120593697127262E-15 |
| q |
-2.645273935039065E-16 |
6.203296827350404E-16 |
2.236139089367889E-13 |
4.560628862030444E-14 |
2.425266165288698E-14 |
-2.652409926260476E-15 |
| tp |
-9.19226050862577E-14 |
2.236139089367889E-13 |
2.898748688977582E-10 |
-8.379790227337674E-12 |
9.796317621430106E-11 |
-1.48593762225558E-12 |
| node |
-1.933144711035429E-14 |
4.560628862030444E-14 |
-8.379790227337674E-12 |
6.578830119592854E-11 |
-6.758853968015789E-11 |
3.11100278346085E-13 |
| peri |
-9.34967743121493E-15 |
2.425266165288698E-14 |
9.796317621430106E-11 |
-6.758853968015789E-11 |
9.743373698231289E-11 |
-7.086234292109128E-13 |
| i |
1.120593697127262E-15 |
-2.652409926260476E-15 |
-1.48593762225558E-12 |
3.11100278346085E-13 |
-7.086234292109128E-13 |
3.172290335195849E-13 |
|
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
12.86 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
13.515 |
km |
0.231 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
3.880 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Salvaggio, F.; Marchini, A.; Franco, L. (2015) Minor Planet Bull. 42, 226-227.]
[Scardella, M.; Franceschini, F.; Tomassini, A. (2015) Minor Planet Bull. 42, 216.]
[Casalnuovo, G.B. (2016) Minor Planet Bull. 43, 112-115.] |
| geometric albedo |
albedo |
0.080 |
|
0.011 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
|
| 1511 Dalera (1939 FB) Discovered 1939-Mar-22 by Boyer, L. at Algiers |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| 1939 FB = 1928 DB = 1954 LM |
|
|
