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7964 (1995 DD2)
Classification: Main-belt Asteroid          SPK-ID: 2007964
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08819217449739811 4.837e-08  
a 2.760380843975342 1.6913e-08 au
q 2.516936854904193 1.3558e-07 au
i 10.24459263128847 5.3953e-06 deg
node 163.3861168630332 2.7824e-05 deg
peri 82.82977115669402 4.4201e-05 deg
M 114.3134681021044 3.2455e-05 deg
tp 2456868.579370070179
(2014-Jul-30.07937007)
0.00015083 JED
period 1675.143182636152
4.59
1.5396e-05
4.215e-08
d
yr
n .2149070024172336 1.9752e-09 deg/d
Q 3.003824833046491 1.8405e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1375  
   data-arc span      14142 days (38.72 yr)  
   first obs. used      1977-03-15  
   last obs. used      2015-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51117  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:05:43  

Additional Information
 Earth MOID = 1.52896 au 
 Jupiter MOID = 2.05665 au 
 T_jup = 3.313 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.5 mag n/a MPO302114  
rotation period rot_per 10.224 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

7964 (1995 DD2)          Discovered 1995-Feb-23 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1995 DD2 = 1977 EG4 = 1982 JP4 = 1986 EY 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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