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11213 (1999 HF8)
Classification: Main-belt Asteroid          SPK-ID: 2011213
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1125783749792434 3.5954e-08  
a 2.716444351163021 1.0908e-08 au
q 2.410631460387543 9.8015e-08 au
i 8.900175011042476 4.0369e-06 deg
node 196.8799896628816 1.9601e-05 deg
peri 353.731136562859 2.451e-05 deg
M 257.5896421016886 1.6422e-05 deg
tp 2459465.701416884665
(2021-Sep-08.20141688)
7.5589e-05 TDB
period 1635.308317590018
4.48
9.85e-06
2.697e-08
d
yr
n .2201419733072343 1.326e-09 deg/d
Q 3.022257241938499 1.2136e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2532  
   data-arc span      15153 days (41.49 yr)  
   first obs. used      1978-08-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4846  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:58:37  

Additional Information
 Earth MOID = 1.41073 au 
 Jupiter MOID = 1.93672 au 
 T_jup = 3.334 
[ 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 12.9   n/a MPO502255  
diameter diameter 14.694 km 0.339 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.621 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:
[Mas, V.; Fornas, G.; Lozano, J.; Rodrigo, O.; et al. (2018) Minor Planet Bull. 45, 76-82.]
geometric albedo albedo 0.075   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11213 (1999 HF8)          Discovered 1999-Apr-16 by LINEAR at Socorro
Reference: 19990728/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 HF8 = 1972 EN = 1978 PE4 = 1979 YJ6 = 1987 RU6 = 1987 SJ22 = 1987 ST30 = 1990 FV3 = 1996 RA24 = 1997 YF8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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