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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07952433814282793 5.2007e-08  
a 3.167104932040289 2.8455e-08 AU
q 2.915243008490899 1.6287e-07 AU
i 9.579487187497955 6.5181e-06 deg
node 169.5030280891606 3.3179e-05 deg
peri 249.19847551 5.3641e-05 deg
M 46.99471860852836 4.1218e-05 deg
tp 2456731.756073293319
(2014-Mar-15.25607329)
0.00023601 JED
period 2058.695455128186
5.64
2.7745e-05
7.596e-08
d
yr
n .1748680209611598 2.3567e-09 deg/d
Q 3.418966855589678 3.0718e-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 = 1.94368 AU 
 T_jup = 3.177 
[ 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-July); 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., in press.]

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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