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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1124687730236598 1.3295e-08  
a 2.716740723907336 9.5476e-09 au
q 2.411192228066069 3.9479e-08 au
i 8.899884439206909 2.8334e-07 deg
node 196.8711363534374 1.7739e-06 deg
peri 353.6784841194199 8.5631e-06 deg
M 301.662910788924 1.008e-05 deg
tp 2459465.540944889890
(2021-Sep-08.04094489)
4.6153e-05 TDB
period 1635.575950920854
4.48
8.622e-06
2.361e-08
d
yr
n .2201059509326451 1.1603e-09 deg/d
Q 3.022289219748604 1.0621e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3032  
   data-arc span      15550 days (42.57 yr)  
   first obs. used      1978-08-09  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47148  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 22:31:19  

Additional Information
 Earth MOID = 1.41066 au 
 Jupiter MOID = 1.93562 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 12.91   n/a E2021B10  
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. 2020-October); 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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