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18340 (1989 OM)
Classification: Main-belt Asteroid          SPK-ID: 2018340
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2899522001184422 5.0521e-08  
a 2.933527121004268 2.4132e-08 au
q 2.082944478161961 1.4605e-07 au
i 17.07066013544486 6.1422e-06 deg
node 25.59749833055832 1.8731e-05 deg
peri 289.0178840765003 2.4349e-05 deg
M 77.62132345299513 2.0031e-05 deg
tp 2458804.803571047517
(2019-Nov-17.30357105)
0.00010206 TDB
period 1835.200793879239
5.02
2.2645e-05
6.2e-08
d
yr
n .1961638209838792 2.4206e-09 deg/d
Q 3.784109763846575 3.1129e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1489  
   data-arc span      11525 days (31.55 yr)  
   first obs. used      1989-07-29  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42782  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:26:57  

Additional Information
 Earth MOID = 1.14 au 
 Jupiter MOID = 1.94779 au 
 T_jup = 3.148 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.79   n/a E2021B10  
diameter diameter 13.143 km 0.532 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 4.52352 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 0.045   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18340 (1989 OM)          Discovered 1989-Jul-29 by Gilmore, A. C., Kilmartin, P. M. at Lake Tekapo
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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