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JPL Small-Body Database Browser
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27981 (1997 UK21)
Classification:
Main-belt Asteroid
SPK-ID:
2027981
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference:
JPL 23
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.1669899555490374
3.7547e-08
a
2.587304536290408
1.0397e-08
au
q
2.15525066678345
9.6309e-08
au
i
4.056751048210623
4.1478e-06
deg
node
23.40876310604649
6.3211e-05
deg
peri
72.60122687098593
6.4951e-05
deg
M
24.20516151548593
1.3807e-05
deg
t
p
2458498.294272008098
(2019-Jan-14.79427201)
5.8201e-05
TDB
period
1520.09157441666
4.16
9.1628e-06
2.509e-08
d
yr
n
.2368278372558911
1.4276e-09
deg/d
Q
3.019358405797366
1.2133e-08
au
Orbit Determination Parameters
# obs. used (total)
1489
data-arc span
15534 days (42.53 yr)
first obs. used
1976-10-22
last obs. used
2019-05-04
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.48046
source
ORB
producer
Otto Matic
solution date
2019-May-30 03:29:19
Additional Information
Earth MOID
= 1.17624 au
Jupiter MOID
= 2.16515 au
T_jup
= 3.398
[ show covariance matrix ]
[
Ephemeris
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Orbit Diagram
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Orbital Elements
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Mission Design
|
Physical Parameters
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Discovery Circumstances
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Close-Approach Data
]
Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
14.2
n/a
MPO267808
27981 (1997 UK21)
Discovered 1997-Oct-20 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference:
20010902/Numbers.arc
Last Updated:
2004-04-19
[ show close-approach data ]
Alternate Designations
1997 UK21
= 1976 UM10
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
2019-Dec-16 11:13 UT
(server date/time)
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