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18848 (1999 RH41)
Classification: Main-belt Asteroid          SPK-ID: 2018848
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .125388185853855 4.5296e-08  
a 2.789585451861188 1.7755e-08 au
q 2.439804392768007 1.2335e-07 au
i 23.94399811583066 5.4842e-06 deg
node 155.4169299114191 1.1481e-05 deg
peri 162.0811671405149 2.4781e-05 deg
M 108.8919163376327 2.4489e-05 deg
tp 2458085.744410519615
(2017-Nov-28.24441052)
0.0001145 TDB
period 1701.79769486613
4.66
1.6247e-05
4.448e-08
d
yr
n .2115410081268908 2.0196e-09 deg/d
Q 3.139366510954368 1.9981e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1693  
   data-arc span      23718 days (64.94 yr)  
   first obs. used      1954-12-30  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43831  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:32:03  

Additional Information
 Earth MOID = 1.43426 au 
 Jupiter MOID = 2.26372 au 
 T_jup = 3.193 
[ 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 12.9   n/a MPO502311  
diameter diameter 16.596 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 27.768 h n/a LCDB (Rev. 2019-January); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.058   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18848 (1999 RH41)          Discovered 1999-Sep-13 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RH41 = 1994 PX39 = 1998 KU65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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