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120825 (1998 HE111)
Classification: Main-belt Asteroid          SPK-ID: 2120825
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1665065488145201 3.4255e-08  
a 2.57044720552597 1.4679e-08 au
q 2.142450912423914 8.8104e-08 au
i 5.635388878922887 5.1248e-06 deg
node 115.1715211405901 4.1275e-05 deg
peri 93.30150520882195 4.6417e-05 deg
M 179.6896235309014 2.4529e-05 deg
tp 2458449.167877030662
(2018-Nov-26.66787703)
9.7873e-05 TDB
period 1505.259786035709
4.12
1.2894e-05
3.53e-08
d
yr
n .2391613748933699 2.0486e-09 deg/d
Q 2.998443498628027 1.7123e-08 au
  Orbit Determination Parameters
   # obs. used (total)      589  
   data-arc span      9707 days (26.58 yr)  
   first obs. used      1994-06-10  
   last obs. used      2021-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53989  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:25:59  

Additional Information
 Earth MOID = 1.14562 au 
 Jupiter MOID = 1.98307 au 
 T_jup = 3.404 
[ 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 15.9   n/a MPO436583  
diameter diameter 1.802 km 0.264 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.260   0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120825 (1998 HE111)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 HE111 = 2002 EB98 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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