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78998 (2504 P-L)
Classification:
Main-belt Asteroid
SPK-ID:
2078998
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
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Discovery Circumstances
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[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference:
JPL 23
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.09295578642188138
5.9463e-08
a
3.015672203542881
2.1971e-08
au
q
2.735348022271944
1.7425e-07
au
i
9.538440052761189
6.1841e-06
deg
node
7.136984830105852
2.7993e-05
deg
peri
28.7619019157065
4.2527e-05
deg
M
116.6112453034127
2.9836e-05
deg
t
p
2458380.898359696171
(2018-Sep-19.39835970)
0.00015857
TDB
period
1912.822300533741
5.24
2.0904e-05
5.723e-08
d
yr
n
.1882035774570111
2.0568e-09
deg/d
Q
3.295996384813817
2.4013e-08
au
Orbit Determination Parameters
# obs. used (total)
852
data-arc span
21766 days (59.59 yr)
first obs. used
1960-09-24
last obs. used
2020-04-28
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.5499
source
ORB
producer
Otto Matic
solution date
2020-May-20 14:36:48
Additional Information
Earth MOID
= 1.74533 au
Jupiter MOID
= 2.1565 au
T_jup
= 3.220
[ hide covariance matrix ]
Orbital Elements at Epoch 2457192.5 (2015-Jun-19.0) TDB
Reference:
JPL 23
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.09159175612320623
5.8916e-08
q
2.740867289976938
1.7211e-07
au
t
p
2456471.492354340029
(2013-Jun-27.99235434)
0.00016472
TDB
node
7.158445458113498
2.7993e-05
deg
peri
29.50932920391979
4.3066e-05
deg
i
9.537253076222731
6.183e-06
deg
Orbit Determination Parameters
# obs. used (total)
852
data-arc span
21766 days (59.59 yr)
first obs. used
1960-09-24
last obs. used
2020-04-28
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.5499
source
ORB
producer
Otto Matic
solution date
2020-May-20 14:36:48
Additional Information
Jupiter MOID
= 2.1565 au
T_jup
= 3.220
Orbit Covariance (6×6)
e
q
tp
node
peri
i
e
3.471089709664511E-15
-1.00782857813149E-14
-4.095695345113412E-12
2.374330751333272E-14
-9.225219720333488E-13
-3.620796444780636E-15
q
-1.00782857813149E-14
2.962217152716181E-14
1.168562282369782E-11
-6.975406828541234E-14
2.664447577115339E-12
1.088633006912313E-14
tp
-4.095695345113412E-12
1.168562282369782E-11
2.713143705736702E-8
-3.511676593019817E-11
5.397818299615137E-9
-3.364628846265824E-12
node
2.374330751333272E-14
-6.975406828541234E-14
-3.511676593019817E-11
7.835935123947904E-10
-7.798849949891861E-10
-2.997674714800695E-11
peri
-9.225219720333488E-13
2.664447577115339E-12
5.397818299615137E-9
-7.798849949891861E-10
1.854645378572518E-9
2.912948636033775E-11
i
-3.620796444780636E-15
1.088633006912313E-14
-3.364628846265824E-12
-2.997674714800695E-11
2.912948636033775E-11
3.822910557843965E-11
[
Ephemeris
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Orbit Diagram
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Orbital Elements
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Mission Design
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Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
14.5
n/a
MPO417370
diameter
diameter
5.345
km
1.882
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)
geometric albedo
albedo
0.129
0.085
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)
78998 (2504 P-L)
Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference:
20040415/Numbers.arc
Last Updated:
2004-04-19
Alternate Designations
2504 P-L
= 2002 RD98
[
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2021-Jan-25 01:04 UT
(server date/time)
Site Manager:
Ryan S. Park
Webmaster
:
Alan B. Chamberlin
