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19648 (1999 RK104)
Classification: Main-belt Asteroid          SPK-ID: 2019648
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1748410288902638 2.4472e-08  
a 2.677785661059846 1.3113e-08 au
q 2.209598860932548 6.9694e-08 au
i 12.1116656549417 6.6666e-07 deg
node 281.0369184858377 3.9187e-06 deg
peri 32.24598404120854 4.6478e-06 deg
M 328.9916225469387 6.0969e-06 deg
tp 2459338.360130582646
(2021-May-03.86013058)
2.7641e-05 TDB
period 1600.52382891943
4.38
1.1756e-05
3.219e-08
d
yr
n .2249263606672127 1.6522e-09 deg/d
Q 3.145972461187144 1.5406e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2099  
   data-arc span      13825 days (37.85 yr)  
   first obs. used      1982-10-16  
   last obs. used      2020-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41413  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:21:22  

Additional Information
 Earth MOID = 1.20263 au 
 Jupiter MOID = 2.13332 au 
 T_jup = 3.324 
[ 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 12.71   n/a E2021B10  
diameter diameter 7.335 km 0.175 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.320 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.328   0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19648 (1999 RK104)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RK104 = 1982 UO11 = 1990 HM2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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