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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1964-Dec-07 13:44 00:02 Jupiter 1.99502248318236 1.99502110835871 1.99502385801609 5.5288641567038 5.45153217529523 2438737.071954229 2.40096504276778 250.674500411187 22.1464105728753 -75.4074451473392 2970020.55841305 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
1976-Feb-27 12:47 00:02 Jupiter 1.85218180720411 1.85218097964952 1.8521826347645 4.94710909517281 4.8537889376233 2442836.032631120 1.93716391154719 228.694069033071 24.4038572129027 -82.597374842007 2091298.23690826 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
1987-May-26 08:14 00:01 Jupiter 1.79993150856523 1.79993094603523 1.79993207109533 4.16170331947034 4.04704862627946 2446941.842808022 1.48985300672937 242.02528640063 23.4044861148533 -88.5073868584889 1839148.31025809 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
1998-Aug-18 17:29 00:01 Jupiter 1.8214329098891 1.82143228600683 1.82143353377287 3.15494502721317 3.00393348898762 2451044.228135664 1.06465413463135 291.740737307007 26.671100363644 -89.0772904134209 2007371.6495895 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
2009-Oct-20 14:54 < 00:01 Jupiter 1.87071406607621 1.87071331955929 1.87071481259366 2.09249857442126 1.86359589140272 2455125.121092914 0.623399738508827 132.149639848551 39.6955038722001 -87.3521557247246 2019837.26941913 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
2020-Dec-09 06:11 < 00:01 Jupiter 1.91380480286616 1.91380402960479 1.91380557612765 2.24514796415901 2.03850879662235 2459192.757582450 0.487886745145592 68.0833142001292 11.394052378149 55.5168012314308 2128128.51483207 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
2032-Feb-17 23:25 < 00:01 Jupiter 1.95059912843056 1.95059844730462 1.95059980955662 3.28685874099465 3.15197813775033 2463280.475713660 0.859218640579236 77.0989151769959 21.9991444143426 75.9778197799824 1941878.04243432 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
2166-Aug-05 19:58 00:05 Jupiter 1.94044385360353 1.94044101458247 1.94044669267058 5.24197117902196 5.1580269964983 2512392.332138462 4.81176425919436 504.192560339067 24.5023278628931 -74.3936373288645 2618151.0614781 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
2177-Oct-31 10:51 00:05 Jupiter 1.78281443702247 1.78281284437458 1.78281602970939 4.76927368072345 4.66859327543734 2516496.952038578 4.85346508089394 461.366429587258 25.3945244973975 -81.5703120807845 1812307.45962101 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
2189-Feb-08 18:04 00:05 Jupiter 1.72466852861437 1.72466796128349 1.72466909594535 4.15818887147388 4.038352493299 2520615.252807072 5.17235609123318 248.466891301404 31.0682212643905 -89.390935604655 949786.704703823 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
2200-May-20 04:59 00:06 Jupiter 1.75946335891589 1.75946186058291 1.75946485740509 3.36258271942115 3.21623124032062 2524732.707723121 6.05476721298282 1017.87026689519 42.6223958214562 -83.9244134720636 2268911.98426077 T 20 CATAB v2.0g-lin.ifort 2021-Aug-25 02:58:30 2021-Aug-25 02:58
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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