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12125 Jamesjones (1999 RS4)
Classification: Main-belt Asteroid          SPK-ID: 2012125
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1961527007608912 3.5414e-08  
a 3.097910507993558 1.5943e-08 au
q 2.490246995135077 1.1682e-07 au
i .2151345056369891 4.0363e-06 deg
node 71.7378684098541 0.00087048 deg
peri 234.0575460470036 0.00087054 deg
M 313.3103318236301 1.0049e-05 deg
tp 2459258.797388424712
(2021-Feb-13.29738842)
5.6098e-05 TDB
period 1991.598215725978
5.45
1.5374e-05
4.209e-08
d
yr
n .1807593505343509 1.3954e-09 deg/d
Q 3.70557402085204 1.907e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1856  
   data-arc span      15260 days (41.78 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47668  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:55:02  

Additional Information
 Earth MOID = 1.47524 au 
 Jupiter MOID = 1.55399 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 13.5   n/a MPO473930  
diameter diameter 11.435 km 0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 0.92 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.049   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12125 Jamesjones           Discovered 1999 Sept. 3 by Spacewatch at Kitt Peak.
James Jones (b. 1939) studied at Sheffield University in Yorkshire and has been professor of physics at the University of Western Ontario since 1966. Jones pioneered the video observation of meteors and single-station radar radiant mapping.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1999 RS4 = 1978 VF10 = 1978 WH13 = 1998 KX18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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