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
JPL Small-Body Database Browser
Search: [ help ]  
91355 (1999 JA57)
Classification: Main-belt Asteroid          SPK-ID: 2091355
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09240853893229323 4.6215e-08  
a 2.448225713079562 1.1228e-08 au
q 2.221988751957408 1.1098e-07 au
i 3.427614651468422 4.2498e-06 deg
node 237.4579558829997 7.6861e-05 deg
peri 308.3080080362715 7.9786e-05 deg
M 220.8024168384499 2.3591e-05 deg
tp 2459541.509390397523
(2021-Nov-23.00939040)
9.322e-05 TDB
period 1399.18650970448
3.83
9.6255e-06
2.635e-08
d
yr
n .257292360598899 1.77e-09 deg/d
Q 2.674462674201717 1.2266e-08 au
  Orbit Determination Parameters
   # obs. used (total)      743  
   data-arc span      12023 days (32.92 yr)  
   first obs. used      1987-02-23  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .569  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:28:31  

Additional Information
 Earth MOID = 1.22498 au 
 Jupiter MOID = 2.29413 au 
 T_jup = 3.489 
[ 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 15.8   n/a MPO417450  
diameter diameter 3.422 km 0.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.079   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91355 (1999 JA57)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 JA57 = 1987 DQ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-26 08:48 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin