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31345 (1998 PG)
Classification: Amor [NEO]          SPK-ID: 2031345
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 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3914322988619213 6.0475e-08  
a 2.015277308300491 9.738e-09 au
q 1.226432678668165 1.2242e-07 au
i 6.49366955264431 5.752e-06 deg
node 222.7883541945897 3.8848e-05 deg
peri 155.9252744247781 4.2881e-05 deg
M 8.951412341313455 2.1411e-05 deg
tp 2457374.516974984031
(2015-Dec-18.01697498)
6.1968e-05 JED
period 1044.962364495035
2.86
7.574e-06
2.074e-08
d
yr
n .3445100151276411 2.497e-09 deg/d
Q 2.804121937932817 1.355e-08 au
  Orbit Determination Parameters
   # obs. used (total)      700  
   data-arc span      13601 days (37.24 yr)  
   first obs. used      1978-10-07  
   last obs. used      2016-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60855  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-03 06:21:33  

Additional Information
 Earth MOID = .232976 au 
 Jupiter MOID = 2.66484 au 
 T_jup = 3.720 
[ 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 17.3 mag n/a PDS3 (MPO 18731)  
rotation period rot_per 2.5162 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:
[Kiss, L.L.; Szabo, G.; Sarneczky, K. (1999) Astron. Astrophys. Suppl. Ser. 140, 21-28.]
[Pravec, P.; Sarounova, L.; Rabinowitz, D.L.; Hicks, M.D.; et al. (2000) Icarus 146, 190-203.]
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

31345 (1998 PG)          Discovered 1998-Aug-03 by LONEOS at Anderson Mesa
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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