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52685 (1998 EZ9)
Classification: Main-belt Asteroid          SPK-ID: 2052685
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593303949010327 4.3863e-08  
a 3.171212708411643 2.2031e-08 au
q 2.665942135265242 1.4022e-07 au
i 10.284289345437 5.1555e-06 deg
node 12.37177237655445 2.3718e-05 deg
peri 216.5226307840817 2.7934e-05 deg
M 12.87414112854986 1.486e-05 deg
tp 2459322.734676468198
(2021-Apr-18.23467647)
8.4995e-05 TDB
period 2062.701985809286
5.65
2.1495e-05
5.885e-08
d
yr
n .1745283625442172 1.8187e-09 deg/d
Q 3.676483281558043 2.5541e-08 au
  Orbit Determination Parameters
   # obs. used (total)      819  
   data-arc span      8532 days (23.36 yr)  
   first obs. used      1998-02-27  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49912  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 17:14:16  

Additional Information
 Earth MOID = 1.66575 au 
 Jupiter MOID = 1.36135 au 
 T_jup = 3.157 
[ 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 14.46   n/a MPO636796  
diameter diameter 8.737 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.021   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52685 (1998 EZ9)          Discovered 1998-Mar-11 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

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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
1906-Nov-01 12:21 00:04 Jupiter 1.892143704322 1.89214111347898 1.89214629516265 1.90107690979309 1.64887500596044 2417516.014562652 3.92028999956967 182.357561213033 45.6035791332999 73.7275876804635 1188690.67106497 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 17:14:19 2021-Aug-25 17:14
1917-Apr-10 20:19 00:03 Jupiter 1.41038132773995 1.41037991358919 1.41038274204825 2.23319839838045 1.94577736516114 2421329.346667986 2.85395435949576 971.743265405123 39.8806455173016 -83.2794132248876 1822841.97902637 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 17:14:19 2021-Aug-25 17:14
1927-Dec-25 03:29 00:02 Jupiter 1.44928890422435 1.44928744393964 1.4492903649956 2.83504603580704 2.62080252626985 2425239.645380091 2.35688721559761 1481.34358819026 30.1641382055302 87.8666616316519 2290551.75610707 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 17:14:19 2021-Aug-25 17:14
2013-Jul-12 14:42 < 00:01 Jupiter 1.82304447042979 1.82304378460915 1.82304515625032 1.59962953060343 1.27654811337716 2456486.112608065 0.376407522420929 95.2026700032743 79.1553869833002 74.5355846013021 1828287.72231128 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 17:14:19 2021-Aug-25 17:14
2023-Dec-25 02:18 < 00:01 Jupiter 1.39462356419594 1.39462299625692 1.39462413213789 2.18413397180047 1.88566811330023 2460303.595954562 0.484881096283918 576.10429074372 31.1289447343038 -85.9041196520161 1852975.07346435 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 17:14:19 2021-Aug-25 17:14
2034-Sep-04 08:40 < 00:01 Jupiter 1.50475395762162 1.50475313501399 1.50475478061954 2.91377860488058 2.71372629405377 2464209.861078524 0.868142283299687 1692.07704134472 14.2029633400604 88.8345801120468 1853465.10572755 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 17:14:19 2021-Aug-25 17:14
2120-Apr-02 15:57 00:04 Jupiter 1.76325205491623 1.76324954827853 1.7632545615859 1.35433397424342 0.934596259116895 2495466.164396883 3.97170733458868 1048.65453090597 156.471297218145 36.7458769493346 1332981.12628638 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 17:14:19 2021-Aug-25 17:14
2130-Sep-21 13:05 00:04 Jupiter 1.3909725627001 1.39097150659918 1.3909736189839 2.107701290596 1.79569469588921 2499290.045266635 3.56709060620805 1175.70250034584 49.2833488899671 -83.5565650793398 1806176.86469368 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 17:14:19 2021-Aug-25 17:14
2141-May-28 09:13 00:04 Jupiter 1.55157083195363 1.55156793393295 1.55157373036565 2.99819931985061 2.81022657253917 2503191.883833083 4.09330796833626 1407.31940869575 40.7120927734971 85.3229304334405 1159853.45974766 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 17:14:19 2021-Aug-25 17:14

Alternate Designations
 1998 EZ9 = 2000 SN202 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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