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

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2032042877964671 2.5709e-08  
a 2.571048095540822 8.7333e-09 au
q 2.048600098395986 6.8861e-08 au
i 8.908066899821744 5.5503e-07 deg
node 112.80826236 5.3903e-06 deg
peri 215.3440306604557 5.9326e-06 deg
M 14.93603831319531 2.7393e-06 deg
tp 2459138.026383628791
(2020-Oct-15.52638363)
1.1293e-05 TDB
period 1505.787640740445
4.12
7.6723e-06
2.101e-08
d
yr
n .2390775367388301 1.2181e-09 deg/d
Q 3.093496092685657 1.0508e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2452  
   data-arc span      13669 days (37.42 yr)  
   first obs. used      1983-09-02  
   last obs. used      2021-02-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48376  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:26:32  

Additional Information
 Earth MOID = 1.04188 au 
 Jupiter MOID = 2.25939 au 
 T_jup = 3.384 
[ 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 13.52   n/a E2021B10  
diameter diameter 5.661 km 0.488 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.29 h n/a LCDB (Rev. 2020-October); 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.]
geometric albedo albedo 0.264   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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