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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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .117440460678588 1.9695e-08  
a 3.950983953508368 3.0344e-08 au
q 3.486978577874636 8.6597e-08 au
i 7.98062565727935 1.1772e-06 deg
node 1.486231130823529 8.9625e-06 deg
peri 215.3838248771982 1.3685e-05 deg
M 355.2952796904746 1.0194e-05 deg
tp 2459237.987599809975
(2021-Jan-23.48759981)
8.1424e-05 TDB
period 2868.509718689772
7.85
3.3046e-05
9.048e-08
d
yr
n .1255007077906762 1.4458e-09 deg/d
Q 4.414989329142099 3.3908e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2372  
   data-arc span      11667 days (31.94 yr)  
   first obs. used      1989-04-06  
   last obs. used      2021-03-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45888  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:00:11  

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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