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20790 (2000 SE45)
Classification: Amor [NEO]          SPK-ID: 2020790
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 149 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5597445430978009 3.9523e-08  
a 2.744887674401816 2.1475e-08 au
q 1.208451777238986 1.1375e-07 au
i 8.335597707758538 5.0932e-06 deg
node 302.95048797 3.5454e-05 deg
peri 169.002478442981 3.7748e-05 deg
M 137.6207280568491 1.7248e-05 deg
tp 2458565.510355572987
(2019-Mar-23.01035557)
7.2181e-05 TDB
period 1661.059894257316
4.55
1.9494e-05
5.337e-08
d
yr
n .2167290904106509 2.5435e-09 deg/d
Q 4.281323571564646 3.3496e-08 au
  Orbit Determination Parameters
   # obs. used (total)      873  
   data-arc span      9877 days (27.04 yr)  
   first obs. used      1992-03-09  
   last obs. used      2019-03-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47652  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:31:39  

Additional Information
 Earth MOID = .226434 au 
 Jupiter MOID = .870786 au 
 T_jup = 3.087 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456171.5 (2012-Sep-01.0) TDB
Reference: JPL 149 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5614803024482992 3.9779e-08  
q 1.20158451862947 1.1434e-07 au
tp 2456910.009435118055
(2014-Sep-09.50943512)
5.3774e-05 TDB
node 302.98041454185 3.5539e-05 deg
peri 168.8058585594134 3.7781e-05 deg
i 8.335863505066637 5.0912e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      873  
   data-arc span      9877 days (27.04 yr)  
   first obs. used      1992-03-09  
   last obs. used      2019-03-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47652  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:31:39  

Additional Information
 Jupiter MOID = .870786 au 
 T_jup = 3.087 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.582404566525066E-15 -4.540101888934405E-15 -1.119664452265706E-12 -8.824474789123991E-14 -1.478649958830778E-13 -3.682008133451618E-14
q -4.540101888934405E-15 1.307434089109024E-14 3.527104992413034E-12 2.693461221805652E-13 5.05597308553202E-13 1.106142849865292E-13
tp -1.119664452265706E-12 3.527104992413034E-12 2.89159588539843E-9 1.223648008765805E-10 6.93638220434741E-10 5.45595785284883E-11
node -8.824474789123991E-14 2.693461221805652E-13 1.223648008765805E-10 1.263011695060006E-9 -1.211503797016301E-9 1.881548907623225E-11
peri -1.478649958830778E-13 5.05597308553202E-13 6.93638220434741E-10 -1.211503797016301E-9 1.427396805659216E-9 -4.939541765929274E-12
i -3.682008133451618E-14 1.106142849865292E-13 5.45595785284883E-11 1.881548907623225E-11 -4.939541765929274E-12 2.59206801947189E-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 16.4   n/a MPO267785  
rotation period rot_per 2.792 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2001) http://www.asu.cas.cz/~ppravec/neo.htm]
SMASSII spectral type spec_B S   n/a Binzel et al. (2004) Icarus 170, 259-294  

20790 (2000 SE45)          Discovered 2000-Sep-26 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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