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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08797123592321052 5.6594e-08  
a 2.760279045762004 2.0114e-08 AU
q 2.51745388661338 1.6325e-07 AU
i 10.24377850633755 5.4883e-06 deg
node 163.3881494598351 3.1409e-05 deg
peri 82.85050120494856 4.7103e-05 deg
M 28.35126382600015 3.2801e-05 deg
tp 2456868.583891166705
(2014-Jul-30.08389117)
0.00015263 JED
period 1675.050518786204
4.59
1.8309e-05
5.013e-08
d
yr
n .2149188910796957 2.3491e-09 deg/d
Q 3.003104204910628 2.1883e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1234  
   data-arc span      13976 days (38.26 yr)  
   first obs. used      1977-03-15  
   last obs. used      2015-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50684  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:58:12  

Additional Information
 Earth MOID = 1.53199 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-July); 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., in press.]

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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