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15256 (1990 RD1)
Classification: Main-belt Asteroid          SPK-ID: 2015256
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08137364719278403 5.2018e-08  
a 3.167360709957179 2.9824e-08 au
q 2.909621017012837 1.6409e-07 au
i 9.595334257172279 6.5255e-06 deg
node 169.4610708257771 3.309e-05 deg
peri 249.13508650 5.2806e-05 deg
M 116.8344897737294 4.0187e-05 deg
tp 2456732.289523968374
(2014-Mar-15.78952397)
0.00023043 JED
period 2058.944852990449
5.64
2.908e-05
7.962e-08
d
yr
n .174846839378495 2.4695e-09 deg/d
Q 3.42510040290152 3.2251e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1223  
   data-arc span      10787 days (29.53 yr)  
   first obs. used      1985-11-06  
   last obs. used      2015-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51369  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:23:00  

Additional Information
 Earth MOID = 1.93738 au 
 Jupiter MOID = 1.90329 au 
 T_jup = 3.176 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.7 mag n/a MPO279676  
rotation period rot_per 22.8245 h n/a LCDB (Rev. 2015-December); 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.]

15256 (1990 RD1)          Discovered 1990-Sep-14 by Holt, H. E. at Palomar
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 RD1 = 1985 VU = 1996 TR27 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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