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JPL Small-Body Database Browser
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19634 (1999 RG45)
Classification: Main-belt Asteroid          SPK-ID: 2019634
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1847757581808841 4.1466e-08  
a 3.169447376790655 1.9651e-08 au
q 2.583810334729748 1.3527e-07 au
i 6.531169459641096 5.0959e-06 deg
node 327.3642429075168 3.2502e-05 deg
peri 334.7601091900801 3.4298e-05 deg
M 261.1074586349202 1.2398e-05 deg
tp 2459566.654263180340
(2021-Dec-18.15426318)
7.3147e-05 TDB
period 2060.979846725752
5.64
1.9168e-05
5.248e-08
d
yr
n .1746741971164476 1.6245e-09 deg/d
Q 3.755084418851562 2.3282e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1931  
   data-arc span      14149 days (38.74 yr)  
   first obs. used      1981-05-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48498  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:52:50  

Additional Information
 Earth MOID = 1.57042 au 
 Jupiter MOID = 1.51841 au 
 T_jup = 3.166 
[ 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 12.8   n/a MPO474024  
diameter diameter 17.847 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.32 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
geometric albedo albedo 0.050   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19634 (1999 RG45)          Discovered 1999-Sep-14 by Juels, C. W. at Fountain Hills
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RG45 = 1981 JU1 = 1997 EJ25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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