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216523 (2001 HY7)
Classification: Aten [NEO, PHA]          SPK-ID: 2216523
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4120706124960631 7.2059e-08  
a .9138088593656916 7.6055e-09 au
q .5372550829825422 6.528e-08 au
i 5.210640317698251 7.8427e-06 deg
node 205.0995331058551 5.5534e-05 deg
peri 211.2863553920085 5.0689e-05 deg
M 310.2719261413798 3.9153e-05 deg
tp 2459244.573811536974
(2021-Jan-30.07381154)
3.5143e-05 TDB
period 319.0666945681481
0.87
3.9833e-06
1.091e-08
d
yr
n 1.128290749641715 1.4086e-08 deg/d
Q 1.290362635748841 1.074e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] 5.396867997093515E-14 1.121E-14
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      291  
   data-arc span      7327 days (20.06 yr)  
   first obs. used      2001-04-15  
   last obs. used      2021-05-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48705  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-08 05:51:07  

Additional Information
 Earth MOID = .0351925 au 
 Jupiter MOID = 4.05865 au 
 T_jup = 6.455 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ 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 20.6   n/a MPO385940  

216523 (2001 HY7)          Discovered 2001-Apr-18 by LINEAR at Socorro
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09

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