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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1848621292904645 1.6538e-08  
a 3.168823663546936 1.6792e-08 au
q 2.583028173757639 5.3984e-08 au
i 6.531361839656668 7.5096e-07 deg
node 327.365990398645 6.6386e-06 deg
peri 334.8223128664189 1.0578e-05 deg
M 295.9913083635884 5.4744e-06 deg
tp 2459566.838012634665
(2021-Dec-18.33801263)
3.2211e-05 TDB
period 2060.371508569593
5.64
1.6377e-05
4.484e-08
d
yr
n .174725770814958 1.3888e-09 deg/d
Q 3.754619153336233 1.9896e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2153  
   data-arc span      14526 days (39.77 yr)  
   first obs. used      1981-05-09  
   last obs. used      2021-02-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4712  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:00:07  

Additional Information
 Earth MOID = 1.56765 au 
 Jupiter MOID = 1.51874 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 12.81   n/a E2021B10  
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. 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:
[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

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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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