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1909 Alekhin (1972 RW2)
Classification:
Main-belt Asteroid
SPK-ID:
2001909
[
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 2459200.5 (2020-Dec-17.0) TDB
Reference:
JPL 40
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.2254168656710686
1.3843e-08
a
2.422621952276291
6.5945e-09
au
q
1.876522105088244
3.6007e-08
au
i
1.795612800557789
1.1097e-06
deg
node
227.4383358396279
2.9085e-05
deg
peri
5.841001543246527
2.9168e-05
deg
M
7.24924067375887
7.9537e-06
deg
t
p
2459172.765718650863
(2020-Nov-19.26571865)
3.0367e-05
TDB
period
1377.294772655444
3.77
5.6236e-06
1.54e-08
d
yr
n
.2613819547909231
1.0672e-09
deg/d
Q
2.968721799464337
8.081e-09
au
Orbit Determination Parameters
# obs. used (total)
3345
data-arc span
34413 days (94.22 yr)
first obs. used
1926-04-14
last obs. used
2020-07-02
planetary ephem.
DE441
SB-pert. ephem.
SB441-N16
condition code
0
norm. resid. RMS
.4528
source
ORB
producer
Otto Matic
solution date
2021-Apr-12 13:05:51
Additional Information
Earth MOID
= .864207 au
Jupiter MOID
= 2.02997 au
T_jup
= 3.477
[ show covariance matrix ]
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Orbital Elements
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Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
12.82
n/a
E2021B10
diameter
diameter
18.681
km
0.043
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
rotation period
rot_per
148.6
h
n/a
LCDB (Rev. 2020-October); Warner et al., 2009
Published Reference List:
[Dymock, R. (2009) Minor Planet Bull. 36, 182-183.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo
albedo
0.060
0.004
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
1909 Alekhin (1972 RW2)
Discovered 1972-Sep-04 by Zhuravleva, L. at Nauchnyj
Reference:
DISCOVERY.DB
Last Updated:
2003-08-29
[ show close-approach data ]
Alternate Designations
1972 RW2
= 1926 GU = 1930 KF = 1930 KM = 1934 NZ = 1934 OC = 1941 FJ = 1960 FD = 1969 UU = 1971 DL
[
Ephemeris
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Orbit Diagram
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Orbital Elements
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Mission Design
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2021-Apr-18 22:18 UT
(server date/time)
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