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1375 Alfreda (1935 UB)
Classification:
Main-belt Asteroid
SPK-ID:
2001375
[
Ephemeris
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Orbit Diagram
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Orbital Elements
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Mission Design
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Physical Parameters
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Discovery Circumstances
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Close-Approach Data
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[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference:
JPL 42
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.07113556704122606
3.0922e-08
a
2.447402372525838
7.2173e-09
au
q
2.273305016978171
7.7185e-08
au
i
5.819602025592749
3.7876e-06
deg
node
52.76331476291183
3.8628e-05
deg
peri
32.76131429429496
5.0137e-05
deg
M
355.9620724274823
3.1179e-05
deg
t
p
2459016.186011027562
(2020-Jun-15.68601103)
0.00012112
TDB
period
1398.480747489321
3.83
6.1861e-06
1.694e-08
d
yr
n
.2574222066669881
1.1387e-09
deg/d
Q
2.621499728073506
7.7307e-09
au
Orbit Determination Parameters
# obs. used (total)
2748
data-arc span
32543 days (89.10 yr)
first obs. used
1931-10-12
last obs. used
2020-11-16
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.41432
source
ORB
producer
Otto Matic
solution date
2020-Dec-18 02:00:09
Additional Information
Earth MOID
= 1.29162 au
Jupiter MOID
= 2.51949 au
T_jup
= 3.487
[ show covariance matrix ]
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Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
11.4
n/a
MPO431509
diameter
diameter
13.928
km
0.174
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
rotation period
rot_per
19.14
h
n/a
LCDB (Rev. 2020-October); Warner et al., 2009
Published Reference List:
[Pligge, Z.; Monnier, A.; Pharo, J.; Stolze, K.; Yim, A.; Ditteon, R. (2011) Minor Planet Bull. 38, 5-7.]
geometric albedo
albedo
0.204
0.021
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
1375 Alfreda (1935 UB)
Discovered 1935-Oct-22 by Delporte, E. at Uccle
Reference:
DISCOVERY.DB
Last Updated:
2003-08-29
[ show close-approach data ]
Alternate Designations
1935 UB
= 1931 TV3 = 1933 FC = A916 WK
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Orbit Diagram
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Close-Approach Data
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2021-Jan-22 11:07 UT
(server date/time)
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