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 ]  
249657 (1999 UF45)
Classification: Main-belt Asteroid          SPK-ID: 2249657
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2317711223635003 5.4852e-08  
a 3.104447242707235 3.4825e-08 au
q 2.384926020946705 1.723e-07 au
i 14.19043490578406 6.6399e-06 deg
node 247.5971309974377 2.6799e-05 deg
peri 147.3873819475513 3.1365e-05 deg
M 276.8422207284402 1.921e-05 deg
tp 2459462.003750530018
(2021-Sep-04.50375053)
0.00011252 TDB
period 1997.905086525409
5.47
3.3618e-05
9.204e-08
d
yr
n .1801887399096031 3.032e-09 deg/d
Q 3.823968464467765 4.2896e-08 au
  Orbit Determination Parameters
   # obs. used (total)      314  
   data-arc span      7572 days (20.73 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58475  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 04:40:39  

Additional Information
 Earth MOID = 1.40597 au 
 Jupiter MOID = 1.66259 au 
 T_jup = 3.133 
[ 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 15.3   n/a MPO440260  
diameter diameter 2.192 km 0.532 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.871 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.306   0.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249657 (1999 UF45)          Discovered 1999-Oct-31 by CSS at Catalina
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-08 16:16 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin