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2113 Ehrdni (1972 RJ2)
Classification:
Main-belt Asteroid
SPK-ID:
2002113
[
Ephemeris
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Orbit Diagram
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Orbital Elements
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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference:
JPL 25
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.0964850458008545
6.7144e-08
a
2.473749569946028
1.0302e-08
au
q
2.235069729389942
1.6031e-07
au
i
6.430692215706843
4.4833e-06
deg
node
23.35307914041671
2.8141e-05
deg
peri
348.7153683278283
3.3474e-05
deg
M
90.88345645029675
1.8806e-05
deg
t
p
2458641.731455007953
(2019-Jun-07.23145501)
7.3567e-05
TDB
period
1421.12416540596
3.89
8.8771e-06
2.43e-08
d
yr
n
.2533205815250928
1.5824e-09
deg/d
Q
2.712429410502115
1.1296e-08
au
Orbit Determination Parameters
# obs. used (total)
2469
data-arc span
22955 days (62.85 yr)
first obs. used
1958-01-11
last obs. used
2020-11-16
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.42608
source
ORB
producer
Otto Matic
solution date
2020-Dec-18 02:04:27
Additional Information
Earth MOID
= 1.23577 au
Jupiter MOID
= 2.71963 au
T_jup
= 3.467
[ show covariance matrix ]
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Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
12.7
n/a
MPO502173
diameter
diameter
7.043
km
2.082
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)
rotation period
rot_per
13.2
h
n/a
LCDB (Rev. 2020-October); Warner et al., 2009
Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
geometric albedo
albedo
0.238
0.157
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)
B-V
BV
0.840
0.030
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2
#obs=1; phase=3.29 deg.
2113 Ehrdni
Discovered 1972 Sept. 11 by N. S. Chernykh at the Crimean Astrophysical Observatory.
Named in memory of Ehrdni Tel'dzhievich Delikov (1922-1942), a hero from the Kalmyk S.S.R. who was killed in the Great Patriotic War (1941-1945).
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference:
MPC 5283
Last Updated:
2007-10-23
[ show close-approach data ]
Alternate Designations
1972 RJ2
= 1958 AA = 1976 UQ2
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2021-Jan-25 15:23 UT
(server date/time)
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Ryan S. Park
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