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18023 (1999 JQ129)
Classification: Main-belt Asteroid          SPK-ID: 2018023
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .179569475194503 4.7886e-08  
a 2.6658341230564 1.2725e-08 au
q 2.187131688623564 1.2872e-07 au
i 13.55924191800987 5.4642e-06 deg
node 177.9616623303762 1.4786e-05 deg
peri 184.7613990329044 1.8198e-05 deg
M 236.9589361254255 1.3769e-05 deg
tp 2459743.870038571222
(2022-Jun-13.37003857)
6.32e-05 TDB
period 1589.820566612168
4.35
1.1383e-05
3.116e-08
d
yr
n .2264406484356551 1.6213e-09 deg/d
Q 3.144536557489235 1.501e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1484  
   data-arc span      10775 days (29.50 yr)  
   first obs. used      1991-09-12  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51082  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:20:17  

Additional Information
 Earth MOID = 1.18302 au 
 Jupiter MOID = 2.31368 au 
 T_jup = 3.321 
[ 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 14.01   n/a E2021B10  
diameter diameter 4.738 km 0.208 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.25775 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.238   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18023 (1999 JQ129)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JQ129 = 1991 RJ34 = 1998 FM128 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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