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123927 (2001 ER4)
Classification: Main-belt Asteroid          SPK-ID: 2123927
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1808976870282966 4.2529e-08  
a 3.024020968641179 2.2932e-08 au
q 2.476982569888921 1.2797e-07 au
i 3.101468247313351 3.9866e-06 deg
node 100.2116817397206 0.00011133 deg
peri 140.9488788292999 0.00011217 deg
M 183.5735900832615 1.5224e-05 deg
tp 2459941.818773508769
(2022-Dec-28.31877351)
8.4955e-05 TDB
period 1920.771151116678
5.26
2.1848e-05
5.982e-08
d
yr
n .1874247225083045 2.1319e-09 deg/d
Q 3.571059367393437 2.708e-08 au
  Orbit Determination Parameters
   # obs. used (total)      451  
   data-arc span      9919 days (27.16 yr)  
   first obs. used      1992-09-28  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58724  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:31:28  

Additional Information
 Earth MOID = 1.46531 au 
 Jupiter MOID = 1.44848 au 
 T_jup = 3.218 
[ 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 15.2   n/a MPO449715  
diameter diameter 5.340 km 1.336 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

123927 (2001 ER4)          Discovered 2001-Mar-02 by LONEOS at Anderson Mesa
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ 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
1941-Apr-28 11:11 00:03 Jupiter 1.44794206024514 1.44794130800182 1.44794281248898 0.841179866499708 n/a 2430112.966313704 3.15330124054074 105.713572508469 33.7722468024868 -80.6203154482619 6334750.2102798 F 16 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:30 2020-Nov-12 17:31
1988-Aug-11 18:04 00:01 Jupiter 1.44080294893622 1.4408024868448 1.44080341102766 0.833273727204314 n/a 2447385.252690486 1.05784171208455 93.605898549027 22.9108207520942 88.4461066646311 9401445.86141366 F 16 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:30 2020-Nov-12 17:31
2035-Nov-30 11:30 < 00:01 Jupiter 1.44978152111892 1.44978099862831 1.44978204360985 0.864530552381343 n/a 2464661.979069590 0.864438711791372 91.7508105220812 24.0075637772932 83.4359687336727 8975857.14231436 F 16 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:30 2020-Nov-12 17:31
2083-Mar-07 16:10 00:03 Jupiter 1.47071482381776 1.47071384547464 1.47071580216578 0.931634615053707 n/a 2481926.173284501 2.90561595410797 167.600822786198 26.9549324026739 75.7696414077909 7915818.18096435 F 16 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:30 2020-Nov-12 17:31
2130-May-17 14:54 00:05 Jupiter 1.52114007474222 1.52113770564691 1.52114244399767 1.1010134014695 0.31394666060581 2499163.120839559 5.3870872482575 25612.0480308008 981.811015319024 5.20376340634729 813925.248654213 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:30 2020-Nov-12 17:31
2168-Jun-30 20:23 00:07 Jupiter 1.90184767625872 1.90184259535552 1.90185275715446 2.18902085318534 1.97511413697515 2513087.349529167 7.10178818387731 252.137389009025 9.56444795405467 -80.3318709423577 920723.433195225 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:30 2020-Nov-12 17:31
2177-Jun-19 14:22 00:08 Jupiter 1.63051200477416 1.6305074801517 1.63051652955287 1.51450153879591 1.12015616473075 2516363.098712775 7.8590130489826 1493.47155964895 102.014274324743 49.8790307502158 1489473.24379698 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 17:31:30 2020-Nov-12 17:31

Alternate Designations
 2001 ER4 = 2002 NZ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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