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JPL Small-Body Database Browser
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31257 (1998 DG35)
Classification: Main-belt Asteroid          SPK-ID: 2031257
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1079526289725854 4.5512e-08  
a 2.962744000325508 1.8261e-08 au
q 2.642907996517615 1.4221e-07 au
i 10.12570098888764 5.7759e-06 deg
node 8.447230126920132 2.2223e-05 deg
peri 301.9659913643153 3.4406e-05 deg
M 357.7666607138572 2.479e-05 deg
tp 2459012.055581971825
(2020-Jun-11.55558197)
0.00012828 TDB
period 1862.685860437092
5.10
1.7221e-05
4.715e-08
d
yr
n .1932693040980746 1.7869e-09 deg/d
Q 3.282580004133401 2.0233e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2000  
   data-arc span      8957 days (24.52 yr)  
   first obs. used      1995-10-20  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44733  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 07:13:14  

Additional Information
 Earth MOID = 1.64651 au 
 Jupiter MOID = 2.07378 au 
 T_jup = 3.233 
[ 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 13.4   n/a MPO351045  
diameter diameter 5.766 km 0.287 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.66121 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.279   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

31257 (1998 DG35)          Discovered 1998-Feb-27 by Elst, E. W. at La Silla
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 DG35 = 1995 UJ46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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