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 ]  
59636 (1999 JJ81)
Classification: Main-belt Asteroid          SPK-ID: 2059636
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2387873295296029 3.2603e-08  
a 2.411671010098507 1.0298e-08 au
q 1.835794529893125 7.6313e-08 au
i 5.4337513359761 3.5329e-06 deg
node 209.7979258389747 4.5861e-05 deg
peri 40.30906469255945 4.6849e-05 deg
M 236.5114884809461 1.1467e-05 deg
tp 2459469.744916342332
(2021-Sep-12.24491634)
4.5528e-05 TDB
period 1367.966686173673
3.75
8.762e-06
2.399e-08
d
yr
n .2631643033698085 1.6856e-09 deg/d
Q 2.98754749030389 1.2757e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1184  
   data-arc span      10481 days (28.70 yr)  
   first obs. used      1991-05-19  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5434  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:51:13  

Additional Information
 Earth MOID = .82607 au 
 Jupiter MOID = 2.05768 au 
 T_jup = 3.474 
[ 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 15.0   n/a MPO449383  
diameter diameter 2.708 km 0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.7 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2017) Minor Planet Bull. 44, 213-219.]
geometric albedo albedo 0.115   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

59636 (1999 JJ81)          Discovered 1999-May-14 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JJ81 = 2002 AY89 
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-06 02:17 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin