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 ]  
48475 (1991 UD2)
Classification: Main-belt Asteroid          SPK-ID: 2048475
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05332307767015067 4.0411e-08  
a 3.046181498344597 2.2065e-08 au
q 2.883749725710992 1.2571e-07 au
i 11.34860931267454 5.9064e-06 deg
node 34.18481607496214 2.1932e-05 deg
peri 98.81903955744262 5.9434e-05 deg
M 333.5138762905358 5.5388e-05 deg
tp 2458743.372285895730
(2019-Sep-16.87228590)
0.00029922 TDB
period 1941.923381717196
5.32
2.1099e-05
5.777e-08
d
yr
n .185383215109991 2.0142e-09 deg/d
Q 3.208613270978202 2.3241e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1461  
   data-arc span      10015 days (27.42 yr)  
   first obs. used      1991-10-29  
   last obs. used      2019-03-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49748  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:46:33  

Additional Information
 Earth MOID = 1.92515 au 
 Jupiter MOID = 1.84019 au 
 T_jup = 3.206 
[ 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 12.9   n/a MPO432042  
diameter diameter 9.578 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.163   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48475 (1991 UD2)          Discovered 1991-Oct-29 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 UD2 = 1999 FY26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin