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1909 Alekhin (1972 RW2)
Classification:
Main-belt Asteroid
SPK-ID:
2001909
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference:
JPL 38
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.2254477002123
2.9083e-08
a
2.422803625255509
6.8276e-09
au
q
1.876588119875631
7.2505e-08
au
i
1.795574312070955
3.1219e-06
deg
node
227.4414098322967
0.00010705
deg
peri
5.811852372789891
0.00010732
deg
M
314.9945792332098
9.1738e-06
deg
t
p
2459172.701953834317
(2020-Nov-19.20195383)
3.5393e-05
TDB
period
1377.449701039098
3.77
5.8226e-06
1.594e-08
d
yr
n
.2613525559070716
1.1048e-09
deg/d
Q
2.969019130635387
8.3669e-09
au
Orbit Determination Parameters
# obs. used (total)
3329
data-arc span
34413 days (94.22 yr)
first obs. used
1926-04-14
last obs. used
2020-07-02
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.45144
source
ORB
producer
Otto Matic
solution date
2020-Nov-13 04:14:19
Additional Information
Earth MOID
= .865593 au
Jupiter MOID
= 2.03075 au
T_jup
= 3.477
[ hide covariance matrix ]
Orbital Elements at Epoch 2456598.5 (2013-Nov-02.0) TDB
Reference:
JPL 38
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.2257459708184269
2.9022e-08
q
1.876035189037529
7.2375e-08
au
t
p
2456417.896898072703
(2013-May-05.39689807)
3.2448e-05
TDB
node
227.5089857333552
0.00010714
deg
peri
5.812960654125728
0.00010741
deg
i
1.794413348905139
3.1214e-06
deg
Orbit Determination Parameters
# obs. used (total)
3329
data-arc span
34413 days (94.22 yr)
first obs. used
1926-04-14
last obs. used
2020-07-02
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.45144
source
ORB
producer
Otto Matic
solution date
2020-Nov-13 04:14:19
Additional Information
Jupiter MOID
= 2.03075 au
T_jup
= 3.477
Orbit Covariance (6×6)
e
q
tp
node
peri
i
e
8.422915309357707E-16
-2.095616044332127E-15
-3.751826932993225E-14
-2.372730443358263E-15
5.97400947894023E-15
-5.290446007355529E-17
q
-2.095616044332127E-15
5.238094480989301E-15
1.050328064063186E-13
7.144827438583244E-15
-1.305202714899949E-14
1.776188979419901E-16
tp
-3.751826932993225E-14
1.050328064063186E-13
1.052865627236017E-9
-2.883877453363458E-12
2.606261794783775E-10
2.558731066565923E-13
node
-2.372730443358263E-15
7.144827438583244E-15
-2.883877453363458E-12
1.147928432971029E-8
-1.14738269987503E-8
1.045403792982009E-11
peri
5.97400947894023E-15
-1.305202714899949E-14
2.606261794783775E-10
-1.14738269987503E-8
1.153723845199431E-8
-1.03856930487402E-11
i
-5.290446007355529E-17
1.776188979419901E-16
2.558731066565923E-13
1.045403792982009E-11
-1.03856930487402E-11
9.743346013460149E-12
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
12.8
n/a
MPO358645
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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Close-Approach Data
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2021-Jan-22 12:49 UT
(server date/time)
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