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233693 (2008 SM18)
Classification: Main-belt Asteroid          SPK-ID: 2233693
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2452496476583796 4.8996e-08  
a 2.800995050034567 2.0776e-08 au
q 2.114052000920724 1.3878e-07 au
i 9.447143851955984 5.0001e-06 deg
node 154.5202707562766 3.8395e-05 deg
peri 291.117791173293 4.0488e-05 deg
M 99.89693865895779 1.182e-05 deg
tp 2458525.365443712068
(2019-Feb-10.86544371)
5.5461e-05 TDB
period 1712.249069489552
4.69
1.905e-05
5.216e-08
d
yr
n .2102497857436836 2.3392e-09 deg/d
Q 3.48793809914841 2.5871e-08 au
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      6969 days (19.08 yr)  
   first obs. used      2001-03-29  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59246  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 11:12:47  

Additional Information
 Earth MOID = 1.15161 au 
 Jupiter MOID = 1.83713 au 
 T_jup = 3.261 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457725.5 (2016-Dec-03.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2456350441877047 4.8877e-08  
q 2.112806949558729 1.3843e-07 au
tp 2458525.837557175127
(2019-Feb-11.33755718)
5.5404e-05 TDB
node 154.5269402741603 3.8396e-05 deg
peri 291.3016609803622 4.0489e-05 deg
i 9.447509360853198 5.0003e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      6969 days (19.08 yr)  
   first obs. used      2001-03-29  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59246  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 11:12:47  

Additional Information
 Jupiter MOID = 1.83713 au 
 T_jup = 3.261 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.388996839095857E-15 -6.72288370982656E-15 -1.348420555701956E-12 -1.635578091611087E-14 -3.360680622151403E-13 -1.19918971658487E-14
q -6.72288370982656E-15 1.91638366943949E-14 3.856262693650182E-12 5.308133595106896E-14 9.215426029558879E-13 3.524887680264178E-14
tp -1.348420555701956E-12 3.856262693650182E-12 3.069560110111878E-9 2.033005246620634E-11 7.540112673197766E-10 1.143410486411419E-11
node -1.635578091611087E-14 5.308133595106896E-14 2.033005246620634E-11 1.474280000896633E-9 -1.449588910444832E-9 6.003598641644129E-11
peri -3.360680622151403E-13 9.215426029558879E-13 7.540112673197766E-10 -1.449588910444832E-9 1.639384351940087E-9 -5.647046961190478E-11
i -1.19918971658487E-14 3.524887680264178E-14 1.143410486411419E-11 6.003598641644129E-11 -5.647046961190478E-11 2.500299962321451E-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 16.2   n/a MPO418248  
diameter diameter 2.498 km 0.433 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.094   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

233693 (2008 SM18)          Discovered 2008-Sep-19 by Spacewatch at Kitt Peak
Reference: 20100228/Numbers.arcLast Updated: 2010-03-03

[ 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
1913-Oct-21 22:09 00:04 Jupiter 1.86425683529879 1.86425607574949 1.8642575948588 1.98812705570512 1.74469251004257 2420062.422685735 4.05953657981115 366.086348243804 59.2776173832834 -71.019593500338 1272417.27562068 T 17 CATAB v2.0f-lin.ifort 2020-May-21 11:13:11 2020-May-21 11:13
1937-Feb-23 20:46 00:03 Jupiter 1.85883628686828 1.85883575519342 1.85883681854346 1.56754605823365 1.24332359409616 2428588.365519813 2.96545045729031 312.355000751946 135.376655931272 -25.0286970027033 880457.328596779 T 17 CATAB v2.0f-lin.ifort 2020-May-21 11:13:11 2020-May-21 11:13
1960-Jun-27 02:26 00:02 Jupiter 1.88090568031924 1.88090495170315 1.88090640893812 1.23533952708208 0.790828584317125 2437112.601695132 2.04210070086631 662.726621278807 197.644766045843 13.0506161741724 1150748.73072013 T 17 CATAB v2.0f-lin.ifort 2020-May-21 11:13:11 2020-May-21 11:13
1983-Oct-16 20:48 00:01 Jupiter 1.95461372219505 1.95461293697401 1.9546145074172 1.15353825135868 0.681146133325013 2445624.366782234 1.21326679627816 673.259707856202 373.932970531161 -1.26780591272369 1206467.40394804 T 17 CATAB v2.0f-lin.ifort 2020-May-21 11:13:11 2020-May-21 11:13
2116-Mar-11 08:37 00:03 Jupiter 1.93997820813148 1.93997694165058 1.93997947462407 2.93027950077578 2.77728447503883 2493982.859350112 2.88296313988066 282.850942511365 19.1832132697558 84.1793300936508 1730185.51485776 T 17 CATAB v2.0f-lin.ifort 2020-May-21 11:13:11 2020-May-21 11:13
2139-Jul-07 00:57 00:04 Jupiter 1.85991394868363 1.85991302647775 1.85991487090632 2.40977921695989 2.21273966781116 2502500.539508402 3.54835581029169 361.113240715858 26.3755443614589 -86.5075795701803 1566349.64894754 T 17 CATAB v2.0f-lin.ifort 2020-May-21 11:13:11 2020-May-21 11:13
2162-Nov-10 08:19 00:04 Jupiter 1.83656927945222 1.83656877945335 1.83656977945235 2.00535156145053 1.76040859144602 2511027.846346873 4.39380481805916 407.206147928737 59.605559982349 -71.5667320590043 1326776.92451414 T 17 CATAB v2.0f-lin.ifort 2020-May-21 11:13:11 2020-May-21 11:13
2186-Mar-16 14:17 00:06 Jupiter 1.84677707222049 1.84677595194479 1.84677819250763 1.64007855518167 1.33137508009885 2519555.094856393 5.5719889623595 466.252659807857 132.621470835887 -30.3217185016784 835049.601079179 T 17 CATAB v2.0f-lin.ifort 2020-May-21 11:13:11 2020-May-21 11:13

Alternate Designations
 2008 SM18 = 2004 YV4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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