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2375 Radek (1975 AA)
Classification: Main-belt Asteroid          SPK-ID: 2002375
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2099998104230387 3.736e-08  
a 3.182410825264524 1.9321e-08 au
q 2.514105155270748 1.2097e-07 au
i 14.97893148824158 4.6138e-06 deg
node 110.703437674226 1.65e-05 deg
peri 101.6824539837457 1.9875e-05 deg
M 281.5144892290451 1.2892e-05 deg
tp 2459452.584669074003
(2021-Aug-26.08466907)
7.6568e-05 TDB
period 2073.637277351707
5.68
1.8885e-05
5.17e-08
d
yr
n .1736079901398015 1.581e-09 deg/d
Q 3.8507164952583 2.3379e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2357  
   data-arc span      30185 days (82.64 yr)  
   first obs. used      1937-06-12  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43119  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:19:56  

Additional Information
 Earth MOID = 1.56001 au 
 Jupiter MOID = 1.507 au 
 T_jup = 3.112 
[ show covariance matrix ]

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 10.5   n/a MPO502176  
diameter diameter 32.744 km 0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.875 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Benishek, V.; Pilcher, F. (2010) Minor Planet Bull. 37, 166.]
[Owings, L.E. (2011) Minor Planet Bull. 38, 9-10.]
[Warner, B.D. (2011) http://www.minorplanetobserver.com/PDO/PDOLightcurves.htm]
geometric albedo albedo 0.111   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.735   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.60, mean=10.02, max.=12.43) deg.
U-B UB 0.230   0.046 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.60, mean=10.02, max.=12.43) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

2375 Radek (1975 AA)          Discovered 1975-Jan-08 by Kohoutek, L. at Bergedorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1975 AA = 1937 LH = 1947 BK = 1948 JP = 1951 YR = 1954 MN = 1954 MX = 1957 YB = 1975 AT = 1981 AO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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