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JPL Small-Body Database Browser
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3128 Obruchev (1979 FJ2)
Classification: Main-belt Asteroid          SPK-ID: 2003128
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593113602862151 3.3061e-08  
a 3.112535330056263 1.7182e-08 au
q 2.616673092686096 1.0019e-07 au
i 2.938528774424684 3.6597e-06 deg
node 102.3621451982849 8.8635e-05 deg
peri 187.7701144076773 8.9795e-05 deg
M 20.85339907135753 1.46e-05 deg
tp 2458484.316564261266
(2018-Dec-31.81656426)
8.133e-05 TDB
period 2005.71795143905
5.49
1.6609e-05
4.547e-08
d
yr
n .1794868514497312 1.4863e-09 deg/d
Q 3.608397567426429 1.992e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2449  
   data-arc span      28212 days (77.24 yr)  
   first obs. used      1942-09-10  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46279  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:25:52  

Additional Information
 Earth MOID = 1.59976 au 
 Jupiter MOID = 1.57009 au 
 T_jup = 3.197 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2   n/a MPO502183  
diameter diameter 20.396 km 0.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12.642 h n/a LCDB (Rev. 2019-January); 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.]
geometric albedo albedo 0.107   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3128 Obruchev (1979 FJ2)          Discovered 1979-Mar-23 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1979 FJ2 = 1942 RG1 = 1952 JE = 1976 YU4 = 1979 HS2 = 1981 VG2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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