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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1257737652705145 4.0619e-08  
a 2.788682596970314 1.5161e-08 au
q 2.437939486605001 1.1154e-07 au
i 23.95109290787163 4.8359e-06 deg
node 155.4071026199213 9.1935e-06 deg
peri 162.2150050566387 2.1511e-05 deg
M 235.6806636492139 2.2933e-05 deg
tp 2459787.899048691834
(2022-Jul-27.39904869)
0.00011048 TDB
period 1700.97157639567
4.66
1.3871e-05
3.798e-08
d
yr
n .2116437481940961 1.726e-09 deg/d
Q 3.139425707335627 1.7068e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2198  
   data-arc span      24191 days (66.23 yr)  
   first obs. used      1954-12-30  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42023  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:48:23  

Additional Information
 Earth MOID = 1.43129 au 
 Jupiter MOID = 2.26731 au 
 T_jup = 3.193 
[ 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 12.90   n/a MPCxxxxx  
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. 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:
[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

Alternate Designations
 1999 RH41 = 1994 PX39 = 1998 KU65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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