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7964 (1995 DD2)
Classification: Main-belt Asteroid          SPK-ID: 2007964
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08891940327501872 3.8662e-08  
a 2.758900526446875 1.2441e-08 au
q 2.513580737940084 1.0953e-07 au
i 10.24597762406105 4.1569e-06 deg
node 163.29958421847 2.3613e-05 deg
peri 81.98830121496844 3.3337e-05 deg
M 99.13950591082876 2.3657e-05 deg
tp 2458539.557514463958
(2019-Feb-25.05751446)
0.00010923 TDB
period 1673.795862390414
4.58
1.1322e-05
3.1e-08
d
yr
n .2150799915862318 1.4548e-09 deg/d
Q 3.004220314953665 1.3547e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2063  
   data-arc span      15609 days (42.74 yr)  
   first obs. used      1977-03-15  
   last obs. used      2019-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4784  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:42:17  

Additional Information
 Earth MOID = 1.52669 au 
 Jupiter MOID = 2.05502 au 
 T_jup = 3.313 
[ 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 12.5   n/a MPO435775  
diameter diameter 7.980 km 0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.224 h n/a LCDB (Rev. 2019-August); 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.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.304   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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