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 ]  
85991 (1999 JJ16)
Classification: Main-belt Asteroid          SPK-ID: 2085991
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1828966234606888 3.271e-08  
a 3.007496616398524 1.6077e-08 au
q 2.457435640189787 1.0119e-07 au
i .4156109053409291 5.1305e-06 deg
node 228.1195584614648 0.00051646 deg
peri 97.01909173156001 0.00051667 deg
M 298.4553939414963 1.466e-05 deg
tp 2459326.181915259890
(2021-Apr-21.68191526)
7.8602e-05 TDB
period 1905.048988080414
5.22
1.5275e-05
4.182e-08
d
yr
n .1889715184504243 1.5153e-09 deg/d
Q 3.55755759260726 1.9017e-08 au
  Orbit Determination Parameters
   # obs. used (total)      774  
   data-arc span      9005 days (24.65 yr)  
   first obs. used      1995-10-22  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .533  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:18:42  

Additional Information
 Earth MOID = 1.44555 au 
 Jupiter MOID = 1.7828 au 
 T_jup = 3.225 
[ 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 MPO436376  
diameter diameter 4.524 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.65 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:
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) ArXiv:1901.08719.]
geometric albedo albedo 0.086   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85991 (1999 JJ16)          Discovered 1999-May-15 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1999 JJ16 = 2000 QQ68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Sep-23 20:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin