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 ]  
49783 (1999 XW9)
Classification: Main-belt Asteroid          SPK-ID: 2049783
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 .2281300250705132 3.6124e-08  
a 2.334148998177457 1.0836e-08 au
q 1.80165952870492 8.6538e-08 au
i 3.105380847236836 4.2109e-06 deg
node 84.39176440974992 8.8539e-05 deg
peri 231.9001996452077 8.9178e-05 deg
M 40.60217017035123 1.1855e-05 deg
tp 2458853.594506573969
(2020-Jan-05.09450657)
4.2595e-05 TDB
period 1302.540662518332
3.57
9.07e-06
2.483e-08
d
yr
n .2763829263525456 1.9245e-09 deg/d
Q 2.866638467649993 1.3308e-08 au
  Orbit Determination Parameters
   # obs. used (total)      692  
   data-arc span      10638 days (29.13 yr)  
   first obs. used      1991-09-14  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:53  

Additional Information
 Earth MOID = .790106 au 
 Jupiter MOID = 2.43577 au 
 T_jup = 3.532 
[ 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 15.9   n/a MPO436131  

49783 (1999 XW9)          Discovered 1999-Dec-04 by Spacewatch at Kitt Peak
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XW9 = 1991 RZ20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-30 06:32 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin