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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2030378512042257 5.5407e-08  
a 2.571264332287904 1.5837e-08 au
q 2.049200347382099 1.4437e-07 au
i 8.905669404042143 4.9537e-06 deg
node 112.8218748802993 3.8181e-05 deg
peri 215.7044694348496 4.0295e-05 deg
M 352.0587915435197 1.6057e-05 deg
tp 2457633.720228144736
(2016-Sep-02.22022814)
6.7297e-05 JED
period 1505.977610038148
4.12
1.3913e-05
3.809e-08
d
yr
n .2390473786598201 2.2085e-09 deg/d
Q 3.093328317193708 1.9052e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1249  
   data-arc span      11912 days (32.61 yr)  
   first obs. used      1983-09-02  
   last obs. used      2016-04-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52264  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:29:40  

Additional Information
 Earth MOID = 1.04399 au 
 Jupiter MOID = 2.25038 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. 2016-February); 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. (2016) 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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