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160857 (2001 EU21)
Classification: Main-belt Asteroid          SPK-ID: 2160857
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2548448816811151 6.1949e-08  
a 2.855137515463017 1.9662e-08 au
q 2.127520333151531 1.8225e-07 au
i 5.976807613705613 7.3037e-06 deg
node 274.0479417832909 5.8717e-05 deg
peri 281.042227305254 6.0724e-05 deg
M 336.0222571374349 1.7529e-05 deg
tp 2459117.866666685792
(2020-Sep-25.36666669)
8.6451e-05 TDB
period 1762.134169553156
4.82
1.8203e-05
4.984e-08
d
yr
n .2042977238738236 2.1104e-09 deg/d
Q 3.582754697774502 2.4673e-08 au
  Orbit Determination Parameters
   # obs. used (total)      283  
   data-arc span      8940 days (24.48 yr)  
   first obs. used      1995-11-30  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5737  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 12:23:39  

Additional Information
 Earth MOID = 1.13621 au 
 Jupiter MOID = 1.46947 au 
 T_jup = 3.247 
[ 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 15.9   n/a MPO236955  
diameter diameter 4.377 km 0.316 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

160857 (2001 EU21)          Discovered 2001-Mar-15 by LONEOS at Anderson Mesa
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

[ hide close-approach data ]
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
1917-Jan-11 00:15 00:03 Jupiter 1.57551060478779 1.57550882737455 1.57551238220582 0.983696138794237 n/a 2421239.510748922 2.56505699642997 224.135570132252 66.2244093204681 -74.0319249653298 3432809.65896229 F 14 CATAB v2.0f-lin.ifort 2020-Nov-12 12:23:39 2020-Nov-12 12:23
1941-Oct-10 04:01 00:02 Jupiter 1.9802372734096 1.98023493775497 1.9802396090639 2.71097545410795 2.54831554756598 2430277.667474101 2.1968348619192 136.209770055622 41.9117220501354 67.7083752954705 906137.527493527 T 14 CATAB v2.0f-lin.ifort 2020-Nov-12 12:23:39 2020-Nov-12 12:23
1998-Aug-18 14:45 < 00:01 Jupiter 1.59607260760336 1.59607160774596 1.59607360752378 0.563548139873158 n/a 2451044.114796406 0.74350915228458 1038.56810239843 43.6832249208197 -88.6725636883781 5462815.51230906 F 14 CATAB v2.0f-lin.ifort 2020-Nov-12 12:23:39 2020-Nov-12 12:23
2023-Apr-01 21:32 < 00:01 Jupiter 1.45738118898352 1.45738042984298 1.45738194824117 0.529360688229556 n/a 2460036.397035170 0.423083829140497 1344.5646990766 33.1137339470959 -89.2177914474202 6581230.56274519 F 14 CATAB v2.0f-lin.ifort 2020-Nov-12 12:23:39 2020-Nov-12 12:23
2047-Nov-15 10:21 00:01 Jupiter 1.65465251800028 1.65465132350377 1.65465371254222 1.50618930183295 1.11570564729534 2469029.930917314 1.22981653771046 694.963512431623 163.043243877612 -64.3051721434682 1653917.63884099 T 14 CATAB v2.0f-lin.ifort 2020-Nov-12 12:23:39 2020-Nov-12 12:23
2104-Sep-24 04:38 00:03 Jupiter 1.88645429285235 1.88645183896785 1.88645674673407 1.87856882716527 1.62204069829251 2489796.693213060 2.7799777107615 350.923278156051 80.7045446959097 66.5177122679552 523521.570668937 T 14 CATAB v2.0f-lin.ifort 2020-Nov-12 12:23:39 2020-Nov-12 12:23
2129-Jun-27 15:05 00:03 Jupiter 1.51928777633833 1.51928617635826 1.5192893806371 0.079863404843412 n/a 2498839.128528997 2.99562058549795 4639.38446734615 39.2816061963266 -89.1407814673552 5783494.72847557 F 14 CATAB v2.0f-lin.ifort 2020-Nov-12 12:23:39 2020-Nov-12 12:23
2154-Jan-27 20:58 00:04 Jupiter 1.47660451622608 1.47660328057146 1.47660575195128 0.988076492074469 n/a 2507819.373465878 3.53448653579156 715.01635424803 43.1014530956954 -86.4626451752028 5113652.80687856 F 14 CATAB v2.0f-lin.ifort 2020-Nov-12 12:23:39 2020-Nov-12 12:23
2178-Sep-24 22:07 00:05 Jupiter 1.76672460876486 1.76672034076644 1.76672887681229 2.02472087505459 1.77218301988006 2516825.421481774 5.04253167030964 590.765857554753 65.9028512477985 -88.8668405752408 1229008.05113623 T 14 CATAB v2.0f-lin.ifort 2020-Nov-12 12:23:39 2020-Nov-12 12:23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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