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161922 (2007 EA57)
Classification: Outer Main-belt Asteroid          SPK-ID: 2161922
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07701228380276801 3.5287e-08  
a 3.231360349654441 3.323e-08 au
q 2.982505909337842 1.1254e-07 au
i 15.06355143334682 5.9363e-06 deg
node 52.23927511480657 1.6183e-05 deg
peri 76.17175405265043 4.3968e-05 deg
M 210.5698613307453 4.0945e-05 deg
tp 2460277.167993920089
(2023-Nov-28.66799392)
0.00024336 TDB
period 2121.663545484369
5.81
3.2728e-05
8.96e-08
d
yr
n .1696781757721218 2.6174e-09 deg/d
Q 3.480214789971041 3.5789e-08 au
  Orbit Determination Parameters
   # obs. used (total)      638  
   data-arc span      9214 days (25.23 yr)  
   first obs. used      1996-05-14  
   last obs. used      2021-08-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53601  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:58:28  

Additional Information
 Earth MOID = 2.04398 au 
 Jupiter MOID = 1.72759 au 
 T_jup = 3.128 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457575.5 (2016-Jul-06.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0778925491342682 3.4634e-08  
q 2.974910542218512 1.102e-07 au
tp 2458133.628090430053
(2018-Jan-15.12809043)
0.00023628 TDB
node 52.67217433220444 1.6145e-05 deg
peri 71.9731712799866 4.396e-05 deg
i 15.12020835102509 5.9404e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      638  
   data-arc span      9214 days (25.23 yr)  
   first obs. used      1996-05-14  
   last obs. used      2021-08-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53601  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:58:28  

Additional Information
 Jupiter MOID = 1.72759 au 
 T_jup = 3.128 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.199516268499215E-15 -3.686422827827722E-15 7.729736401585012E-13 2.215124989485925E-15 1.175172465741576E-13 -1.160900317737084E-15
q -3.686422827827722E-15 1.214308647207593E-14 -1.343651619879293E-12 -6.374330003164807E-15 -2.237207134417609E-13 6.335523133683429E-15
tp 7.729736401585012E-13 -1.343651619879293E-12 5.582795881886914E-8 -2.257145658715061E-12 9.67409778239393E-9 -4.554285376574715E-12
node 2.215124989485925E-15 -6.374330003164807E-15 -2.257145658715061E-12 2.606615163831612E-10 -2.52022227372966E-10 -2.715930329843116E-11
peri 1.175172465741576E-13 -2.237207134417609E-13 9.67409778239393E-9 -2.52022227372966E-10 1.932518546817199E-9 2.541045880019323E-11
i -1.160900317737084E-15 6.335523133683429E-15 -4.554285376574715E-12 -2.715930329843116E-11 2.541045880019323E-11 3.528847780974449E-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 14.66   n/a E2021B55  
diameter diameter 5.757 km 1.503 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.111   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

161922 (2007 EA57)          Discovered 2007-Mar-14 by Lowe, A. at Mayhill
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

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