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20514 (1999 RD34)
Classification: Main-belt Asteroid          SPK-ID: 2020514
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1209534040727236 4.9813e-08  
a 3.0610534574271 1.6726e-08 au
q 2.690808621702713 1.6094e-07 au
i 3.213775709604155 4.3187e-06 deg
node 3.606873123072163 5.992e-05 deg
peri 1.748690214744766 6.1705e-05 deg
M 344.8689150426892 1.457e-05 deg
tp 2459282.719033438530
(2021-Mar-09.21903344)
7.9322e-05 TDB
period 1956.161909167633
5.36
1.6033e-05
4.39e-08
d
yr
n .1840338462337117 1.5084e-09 deg/d
Q 3.431298293151487 1.8749e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1508  
   data-arc span      9189 days (25.16 yr)  
   first obs. used      1995-11-23  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52191  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:04  

Additional Information
 Earth MOID = 1.68739 au 
 Jupiter MOID = 2.02711 au 
 T_jup = 3.220 
[ 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 13.94   n/a E2021B10  
diameter diameter 4.996 km 0.373 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.291 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 0.162   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20514 (1999 RD34)          Discovered 1999-Sep-07 by Korlevic, K. at Visnjan
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RD34 = 1997 GW8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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