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243915 (2001 HE57)
Classification: Main-belt Asteroid          SPK-ID: 2243915
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3307187217313841 3.9441e-08  
a 3.181036553966144 2.744e-08 au
q 2.129008211057654 1.224e-07 au
i 24.23944766180465 8.1191e-06 deg
node 177.4467528118063 1.2013e-05 deg
peri 100.6677462660317 1.7104e-05 deg
M 94.360066605548 1.2411e-05 deg
tp 2458457.328275094955
(2018-Dec-04.82827510)
6.827e-05 TDB
period 2072.294223606652
5.67
2.6813e-05
7.341e-08
d
yr
n .1737205054663766 2.2478e-09 deg/d
Q 4.233064896874635 3.6514e-08 au
  Orbit Determination Parameters
   # obs. used (total)      403  
   data-arc span      7158 days (19.60 yr)  
   first obs. used      2001-03-16  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6299  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:53:36  

Additional Information
 Earth MOID = 1.26038 au 
 Jupiter MOID = 1.88022 au 
 T_jup = 2.981 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457463.5 (2016-Mar-16.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3311978231791347 3.9215e-08  
q 2.12559593369418 1.2147e-07 au
tp 2458458.022024471004
(2018-Dec-05.52202447)
6.8218e-05 TDB
node 177.4752544176499 1.2004e-05 deg
peri 100.8254962698255 1.7129e-05 deg
i 24.25655991676915 8.1242e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      403  
   data-arc span      7158 days (19.60 yr)  
   first obs. used      2001-03-16  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6299  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:53:36  

Additional Information
 Jupiter MOID = 1.88022 au 
 T_jup = 2.981 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.537806943118865E-15 -4.712326219539288E-15 3.284626664136075E-13 -9.561516982115165E-16 -8.908857323782753E-15 -1.918811857371381E-15
q -4.712326219539288E-15 1.475441074912464E-14 -5.601615084593582E-13 3.64729115201448E-15 7.120905412345313E-14 6.403803544086581E-15
tp 3.284626664136075E-13 -5.601615084593582E-13 4.653674992982783E-9 -5.003216199712068E-12 8.344524895806887E-10 -3.855282240047303E-12
node -9.561516982115165E-16 3.64729115201448E-15 -5.003216199712068E-12 1.440911511325091E-10 -1.318603138690554E-10 2.912366783206307E-11
peri -8.908857323782753E-15 7.120905412345313E-14 8.344524895806887E-10 -1.318603138690554E-10 2.933953526991407E-10 -2.722700695503106E-11
i -1.918811857371381E-15 6.403803544086581E-15 -3.855282240047303E-12 2.912366783206307E-11 -2.722700695503106E-11 6.600279290711168E-11

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 15.1   n/a MPO440241  
diameter diameter 8.017 km 3.223 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

243915 (2001 HE57)          Discovered 2001-Apr-25 by LONEOS at Anderson Mesa
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28

[ show close-approach data ]
Alternate Designations
 2001 HE57 = 2002 RY85 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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