+ View the NASA Portal
+ Center for Near-Earth Object Studies
IMPORTANT:
The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.
Please visit
this page
for more details.
Don't show this message again
JPL Small-Body Database Browser
Search:
[
help
]
312477 (2008 SD278)
Classification:
Jupiter Trojan
SPK-ID:
2312477
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
]
[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference:
JPL 7
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.06834045883938435
1.5783e-07
a
5.179310429520143
2.4996e-07
au
q
4.825353978295127
9.8752e-07
au
i
6.579892460621116
1.0305e-05
deg
node
269.7298413613204
0.00012366
deg
peri
102.9474789019973
0.00015961
deg
M
319.1089589561836
9.6369e-05
deg
t
p
2459089.526063578146
(2020-Aug-28.02606358)
0.0011579
TDB
period
4305.328952116632
11.79
0.00031167
8.533e-07
d
yr
n
.08361730404433161
6.0531e-09
deg/d
Q
5.533266880745159
2.6704e-07
au
Orbit Determination Parameters
# obs. used (total)
124
data-arc span
8390 days (22.97 yr)
first obs. used
1996-10-12
last obs. used
2019-10-02
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.55795
source
ORB
producer
Otto Matic
solution date
2019-Nov-08 08:11:19
Additional Information
Earth MOID
= 3.83289 au
Jupiter MOID
= .0221293 au
T_jup
= 2.982
[ show covariance matrix ]
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
]
Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
13.9
n/a
MPO455303
312477 (2008 SD278)
Discovered 2008-Sep-28 by Mt. Lemmon Survey at Mount Lemmon
Reference:
20120109/Numbers.arc
Last Updated:
2012-01-11
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
]
2019-Dec-15 19:53 UT
(server date/time)
Site Manager:
Ryan S. Park
Webmaster
:
Alan B. Chamberlin