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15505 (1999 RF56)
Classification: Outer Main-belt Asteroid          SPK-ID: 2015505
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1174404606576007 1.9695e-08  
a 3.950983952906516 3.0279e-08 au
q 3.486978577426387 8.6583e-08 au
i 7.980625653549693 1.1769e-06 deg
node 1.486231160343684 8.9596e-06 deg
peri 215.3838246955002 1.3674e-05 deg
M 355.2952799193418 1.0171e-05 deg
tp 2459237.987597977776
(2021-Jan-23.48759798)
8.1243e-05 TDB
period 2868.509718034334
7.85
3.2975e-05
9.028e-08
d
yr
n .1255007078193524 1.4427e-09 deg/d
Q 4.414989328386645 3.3835e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2380  
   data-arc span      11673 days (31.96 yr)  
   first obs. used      1989-04-06  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4582  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:03:58  

Additional Information
 Earth MOID = 2.48381 au 
 Jupiter MOID = .633227 au 
 T_jup = 3.031 
[ 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 11.58   n/a E2021B10  
diameter diameter 24.788 km 0.344 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 15.11 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:
[Warner, B.D.; Stephens, R.D.; Coley, D.R. (2017) Minor Planet Bull. 44, 130-137.]
geometric albedo albedo 0.079   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

15505 (1999 RF56)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RF56 = 1989 GG5 = 1997 EV46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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