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227958 (2007 HH)
Classification: Main-belt Asteroid          SPK-ID: 2227958
[ 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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1024683671859453 5.5744e-08  
a 2.720041947699199 2.5175e-08 au
q 2.441323690641183 1.5041e-07 au
i 5.320863314608705 7.7502e-06 deg
node 147.9525402339222 6.359e-05 deg
peri 277.5135012041394 7.4896e-05 deg
M 152.7209293641679 3.8291e-05 deg
tp 2458505.383036919371
(2019-Jan-21.88303692)		 0.00017425 TDB
period 1638.558040151237
4.49		 2.2748e-05
6.228e-08		 d
yr
n .2197053697083396 3.0501e-09 deg/d
Q 2.998760204757215 2.7754e-08 au
   Orbit Determination Parameters
   # obs. used (total)      275  
   data-arc span      6639 days (18.18 yr)  
   first obs. used      2002-02-13  
   last obs. used      2020-04-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58578  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:41:49  

Additional Information
 Earth MOID = 1.46133 au 
 Jupiter MOID = 2.26489 au 
 T_jup = 3.345 
[ 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 16.57   n/a E2021B55  
diameter diameter 3.678 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.036   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

227958 (2007 HH)          Discovered 2007-Apr-16 by Yeung, W. K. Y. at 7300
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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