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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2389650128984385 3.2701e-08  
a 2.411355956011415 1.0337e-08 au
q 1.835126248880421 7.6485e-08 au
i 5.434820379709079 3.7085e-06 deg
node 209.8088620368716 4.8077e-05 deg
peri 40.24919986910822 4.9128e-05 deg
M 131.314235099071 1.1288e-05 deg
tp 2458101.615833488873
(2017-Dec-14.11583349)
4.1194e-05 TDB
period 1367.698633803916
3.74
8.7949e-06
2.408e-08
d
yr
n .2632158803864189 1.6926e-09 deg/d
Q 2.987585663142409 1.2808e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1154  
   data-arc span      10428 days (28.55 yr)  
   first obs. used      1991-05-19  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54556  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 06:12:11  

Additional Information
 Earth MOID = .825203 au 
 Jupiter MOID = 2.05735 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-January); 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-Jan-28 19:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin