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19649 (1999 RQ104)
Classification: Main-belt Asteroid          SPK-ID: 2019649
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06266944320458351 3.7855e-08  
a 3.118793429232638 1.75e-08 au
q 2.923340381552515 1.2381e-07 au
i 10.26326465656434 4.8872e-06 deg
node 205.2670144294863 2.0193e-05 deg
peri 139.3856731176888 4.2926e-05 deg
M 313.5435604306085 3.7794e-05 deg
tp 2459460.110207486397
(2021-Sep-02.61020749)
0.00021172 TDB
period 2011.770070228977
5.51
1.6932e-05
4.636e-08
d
yr
n .1789468912612987 1.5061e-09 deg/d
Q 3.314246476912761 1.8597e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1470  
   data-arc span      9483 days (25.96 yr)  
   first obs. used      1994-09-06  
   last obs. used      2020-08-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51057  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:00:20  

Additional Information
 Earth MOID = 1.92468 au 
 Jupiter MOID = 1.98058 au 
 T_jup = 3.189 
[ 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 13.52   n/a E2021B10  
diameter diameter 11.456 km 0.209 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.126 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 0.064   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19649 (1999 RQ104)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RQ104 = 1998 MS8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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