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 ]  
74538 (1999 JS12)
Classification: Main-belt Asteroid          SPK-ID: 2074538
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09101542112280457 4.6627e-08  
a 3.193142368779267 2.0553e-08 au
q 2.902517171379753 1.4913e-07 au
i 20.36714572006721 5.8165e-06 deg
node 63.04337775557415 1.3715e-05 deg
peri 272.325864041694 3.5534e-05 deg
M 142.3502014922486 3.4642e-05 deg
tp 2458176.397112520176
(2018-Feb-26.89711252)
0.00019946 TDB
period 2084.135016197301
5.71
2.0122e-05
5.509e-08
d
yr
n .1727335307943982 1.6677e-09 deg/d
Q 3.483767566178782 2.2424e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1528  
   data-arc span      7600 days (20.81 yr)  
   first obs. used      1999-04-12  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4792  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:18:18  

Additional Information
 Earth MOID = 1.98712 au 
 Jupiter MOID = 1.8802 au 
 T_jup = 3.092 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456720.5 (2014-Mar-04.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08824182182986982 4.5471e-08  
q 2.913571536285217 1.4391e-07 au
tp 2456080.254647350782
(2012-Jun-01.75464735)
0.00020683 TDB
node 63.36018809869982 1.3721e-05 deg
peri 270.2986209157355 3.7121e-05 deg
i 20.38911799988653 5.8083e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1528  
   data-arc span      7600 days (20.81 yr)  
   first obs. used      1999-04-12  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4792  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:18:18  

Additional Information
 Jupiter MOID = 1.8802 au 
 T_jup = 3.092 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.067656913958504E-15 -6.487909136558218E-15 4.054223832193592E-12 -2.454632973382491E-15 6.520299750566331E-13 4.028491011904617E-15
q -6.487909136558218E-15 2.070956519149504E-14 -1.253826709928951E-11 1.358358364723418E-14 -2.001170870194852E-12 -1.264332080745309E-14
tp 4.054223832193592E-12 -1.253826709928951E-11 4.277809585113542E-8 5.64787063802399E-12 7.168597370212953E-9 6.535658941796349E-13
node -2.454632973382491E-15 1.358358364723418E-14 5.64787063802399E-12 1.882563262364549E-10 -1.741128863831896E-10 -2.645575710507213E-11
peri 6.520299750566331E-13 -2.001170870194852E-12 7.168597370212953E-9 -1.741128863831896E-10 1.377960031150762E-9 2.460923732873331E-11
i 4.028491011904617E-15 -1.264332080745309E-14 6.535658941796349E-13 -2.645575710507213E-11 2.460923732873331E-11 3.37368998024877E-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 12.9   n/a MPO459337  
diameter diameter 10.065 km 0.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.110   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74538 (1999 JS12)          Discovered 1999-May-14 by CSS at Catalina
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JS12 = 2001 QO147 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-09 11:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin