Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
66139 (1998 SH138)
Classification: Main-belt Asteroid          SPK-ID: 2066139
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2343729955283944 5.7092e-08  
a 3.087238455927722 1.9689e-08 au
q 2.363673131101486 1.7966e-07 au
i .6754720772434729 6.6038e-06 deg
node 173.4413583434938 0.00036608 deg
peri 166.1603761815892 0.00036625 deg
M 27.45566160702346 9.9974e-06 deg
tp 2458849.393515219217
(2019-Dec-31.89351522)
5.4452e-05 TDB
period 1981.315740982407
5.42
1.8954e-05
5.189e-08
d
yr
n .1816974410254769 1.7382e-09 deg/d
Q 3.810803780753957 2.4304e-08 au
  Orbit Determination Parameters
   # obs. used (total)      566  
   data-arc span      7705 days (21.10 yr)  
   first obs. used      1998-09-18  
   last obs. used      2019-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55063  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 07:41:37  

Additional Information
 Earth MOID = 1.35501 au 
 Jupiter MOID = 1.5966 au 
 T_jup = 3.183 
[ 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 15.3   n/a MPO449420  
diameter diameter 5.200 km 0.250 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66139 (1998 SH138)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ 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
1908-Aug-13 17:49 00:03 Jupiter 1.57941471368808 1.57941416371451 1.57941526366198 0.845113991107845 n/a 2418167.242478902 3.34190350660966 131.105722127312 26.3533362516685 -86.6112768794063 8947973.50491979 F 15 CATAB v2.0f-lin.ifort 2019-Nov-07 07:41:39 2019-Nov-07 07:41
1968-Aug-03 04:37 00:01 Jupiter 1.61340913121236 1.61340852589571 1.6134097365292 0.865015797888512 n/a 2440071.692175108 1.4193776139717 81.7366076039556 28.1566616167574 81.8505649864161 8493341.0892537 F 15 CATAB v2.0f-lin.ifort 2019-Nov-07 07:41:39 2019-Nov-07 07:41
1978-Apr-28 14:43 00:01 Jupiter 1.84889739872679 1.84889666365591 1.84889813379714 2.18442316788198 1.96353214284416 2443627.113501074 1.08745792360345 63.6835909477373 15.0553364073487 88.4412705837527 1307107.19790401 T 15 CATAB v2.0f-lin.ifort 2019-Nov-07 07:41:39 2019-Nov-07 07:41
2028-Jul-28 14:20 < 00:01 Jupiter 1.7253580352088 1.72535738110136 1.72535868931554 1.17966799984277 0.640129118865578 2461981.097147657 0.606942975463374 979.406977097237 358.254293109413 -16.0268536253707 1218589.85166737 T 15 CATAB v2.0f-lin.ifort 2019-Nov-07 07:41:39 2019-Nov-07 07:41
2038-Apr-29 14:12 < 00:01 Jupiter 1.7005033380291 1.70050263678106 1.70050403927811 1.39388325226016 0.972989414239345 2465543.091851030 0.959843993227212 295.604393500803 115.849320914724 -28.0922119269919 1571472.69806921 T 15 CATAB v2.0f-lin.ifort 2019-Nov-07 07:41:39 2019-Nov-07 07:41
2088-Jul-23 18:56 00:02 Jupiter 1.88481109810205 1.88480962676697 1.88481256943392 1.76424242564023 1.48787218420269 2483891.289206140 2.44222396880643 116.828096843994 73.3066298457026 45.0694644880525 768614.686684777 T 15 CATAB v2.0f-lin.ifort 2019-Nov-07 07:41:39 2019-Nov-07 07:41
2098-Apr-26 16:19 00:03 Jupiter 1.607278962735 1.6072782230678 1.60727970240312 0.943877362745456 n/a 2487455.180038866 2.8068452191321 104.144779750676 28.9280809430655 -76.7783009336656 8106249.10613633 F 15 CATAB v2.0f-lin.ifort 2019-Nov-07 07:41:39 2019-Nov-07 07:41
2158-Apr-16 18:36 00:05 Jupiter 1.59386025154533 1.59385956638782 1.59386093670699 0.820964479549144 n/a 2509359.275092340 4.69305705939712 214.077273154398 27.1502013817916 84.3947230583874 8738228.8522573 F 15 CATAB v2.0f-lin.ifort 2019-Nov-07 07:41:39 2019-Nov-07 07:41
2168-Jan-08 11:28 00:05 Jupiter 1.94359966849489 1.94359678978691 1.94360254719833 2.66576946635117 2.49694313427242 2512912.977669801 5.10997833186808 78.1040388835594 39.5837352098229 -61.8564986329526 443367.218556671 T 15 CATAB v2.0f-lin.ifort 2019-Nov-07 07:41:39 2019-Nov-07 07:41

Alternate Designations
 1998 SH138 = 1999 XS218 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-29 04:28 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin