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1268 Libya (1930 HJ)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001268
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 93 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020644496553516 3.6776e-08  
a 3.97562689482228 3.1123e-08 au
q 3.569856723767229 1.5006e-07 au
i 4.426372362771176 5.6024e-06 deg
node 350.9937518101007 4.9038e-05 deg
peri 118.9254653566716 5.6345e-05 deg
M 282.5402920046948 2.9857e-05 deg
tp 2459623.488760387327
(2022-Feb-12.98876039)
0.00024457 TDB
period 2895.388577414094
7.93
3.4e-05
9.309e-08
d
yr
n .1243356428246741 1.4601e-09 deg/d
Q 4.38139706587733 3.43e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2698  
   data-arc span      32970 days (90.27 yr)  
   first obs. used      1930-04-29  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45011  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:31:05  

Additional Information
 Earth MOID = 2.58961 au 
 Jupiter MOID = .740636 au 
 T_jup = 3.043 
[ 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 9.1   n/a MPO502165 IRAS observations used: 12
diameter diameter 96.710 km 1.184 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 14.05 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Dahlgren, M.; Lahulla, J.F.; Lagerkvist, C.-I.; Lagerros, J.; et al. (1998) Icarus 133, 247-285.]
geometric albedo albedo 0.043   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
B-V BV 0.663   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=.82, mean=2.86, max.=3.94) deg.
U-B UB 0.228   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=.82, mean=2.86, max.=3.94) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1268 Libya (1930 HJ)          Discovered 1930-Apr-29 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1930 HJ = 1929 EA = 1930 KN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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