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30971 (1995 DJ)
Classification: Main-belt Asteroid          SPK-ID: 2030971
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2806359976969389 3.3117e-08  
a 2.442543054931676 6.8233e-09 au
q 1.757077547793196 8.1116e-08 au
i 7.796808220172455 3.5176e-06 deg
node 337.2588739314705 2.3053e-05 deg
peri 56.58046217744688 2.3831e-05 deg
M 13.90211738713936 4.5714e-06 deg
tp 2459146.655640017852
(2020-Oct-24.15564002)
1.7739e-05 TDB
period 1394.317790145053
3.82
5.8426e-06
1.6e-08
d
yr
n .2581907815739399 1.0819e-09 deg/d
Q 3.128008562070156 8.7381e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2001  
   data-arc span      17012 days (46.58 yr)  
   first obs. used      1974-08-26  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43479  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:32:57  

Additional Information
 Earth MOID = .775597 au 
 Jupiter MOID = 2.38161 au 
 T_jup = 3.433 
[ 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 14.09   n/a MPCxxxxx  
rotation period rot_per 32.00 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

30971 (1995 DJ)          Discovered 1995-Feb-21 by Kobayashi, T. at Oizumi
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 DJ = 1974 QU3 = 2001 OF102 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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