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18323 (1983 RZ2)
Classification: Main-belt Asteroid          SPK-ID: 2018323
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2029316327557803 5.5823e-08  
a 2.570882382290281 1.6236e-08 au
q 2.049169022829044 1.4515e-07 au
i 8.906039557117511 4.9964e-06 deg
node 112.821499806844 3.8874e-05 deg
peri 215.723986837358 4.116e-05 deg
M 304.2227981728243 1.7092e-05 deg
tp 2457633.779170073601
(2016-Sep-02.27917007)
7.2443e-05 JED
period 1505.642062983148
4.12
1.4263e-05
3.905e-08
d
yr
n .2391006527054162 2.265e-09 deg/d
Q 3.092595741751518 1.9531e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1230  
   data-arc span      11613 days (31.79 yr)  
   first obs. used      1983-09-02  
   last obs. used      2015-06-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51977  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:22:41  

Additional Information
 Earth MOID = 1.04261 au 
 Jupiter MOID = 2.25014 au 
 T_jup = 3.384 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4 mag n/a MPO250394  
rotation period rot_per 3.2885 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

18323 (1983 RZ2)          Discovered 1983-Sep-02 by Debehogne, H. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1983 RZ2 = 1987 OK = 1999 GX3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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