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26269 Marciaprill (1998 RG57)
Classification: Main-belt Asteroid          SPK-ID: 2026269
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1804846775988613 3.3494e-08  
a 2.403220548985339 9.0779e-09 au
q 1.969476063002761 8.1691e-08 au
i 2.43723151929428 4.3377e-06 deg
node 7.669383363109798 9.542e-05 deg
peri 292.4696527286839 9.6268e-05 deg
M 338.8265427408347 1.3242e-05 deg
tp 2459080.534667663908
(2020-Aug-19.03466766)
5.0067e-05 TDB
period 1360.782984391216
3.73
7.7103e-06
2.111e-08
d
yr
n .2645535725603271 1.499e-09 deg/d
Q 2.836965034967916 1.0716e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1171  
   data-arc span      18134 days (49.65 yr)  
   first obs. used      1971-03-24  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51462  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 20:50:31  

Additional Information
 Earth MOID = .955502 au 
 Jupiter MOID = 2.38432 au 
 T_jup = 3.501 
[ 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 15.5   n/a MPO384974  
rotation period rot_per 57.282 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.]

26269 Marciaprill           Discovered 1998 Sept. 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Marcia Prill mentored a finalist in the 2010 Intel Science Talent Search (STS), a science competition for high school seniors. She teaches at the Madison High School, Madison, New Jersey.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100228/MPCPages.arcLast Updated: 2010-10-29

[ show close-approach data ]
Alternate Designations
 1998 RG57 = 1284 T-1 = 2001 HO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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