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5239 Reiki (1990 VC4)
Classification: Main-belt Asteroid          SPK-ID: 2005239
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1390244749669874 2.3923e-08  
a 2.783638398941902 1.118e-08 au
q 2.396644532031058 6.6705e-08 au
i 8.500498441355676 7.3591e-07 deg
node 81.5802658853471 7.1635e-06 deg
peri 353.7003819442286 9.876e-06 deg
M 158.1686442023704 8.0793e-06 deg
tp 2458455.192406274899
(2018-Dec-02.69240627)
3.5828e-05 TDB
period 1696.358561420957
4.64
1.0219e-05
2.798e-08
d
yr
n .2122192844055595 1.2785e-09 deg/d
Q 3.170632265852745 1.2734e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2408  
   data-arc span      32721 days (89.59 yr)  
   first obs. used      1931-01-12  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46024  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:18:19  

Additional Information
 Earth MOID = 1.41162 au 
 Jupiter MOID = 2.08979 au 
 T_jup = 3.302 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.82   n/a MPCxxxxx  
diameter diameter 10.477 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.174   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

5239 Reiki (1990 VC4)          Discovered 1990-Nov-14 by Izumikawa-Muramatsu at Yatsugatake
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1990 VC4 = 1931 AV = 1976 YX3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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