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 ]  
49869 (1999 XG115)
Classification: Main-belt Asteroid          SPK-ID: 2049869
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1356545804759008 4.6455e-08  
a 2.204118373793666 8.029e-09 au
q 1.905119620477462 1.0412e-07 au
i 5.558849909209511 3.1388e-06 deg
node 250.9161632574739 5.2935e-05 deg
peri 103.2036672853139 5.4771e-05 deg
M 141.3827106971961 1.4626e-05 deg
tp 2458531.098360118927
(2019-Feb-16.59836012)
4.7459e-05 TDB
period 1195.228111866564
3.27
6.5309e-06
1.788e-08
d
yr
n .3011977349142125 1.6458e-09 deg/d
Q 2.503117127109871 9.1182e-09 au
  Orbit Determination Parameters
   # obs. used (total)      756  
   data-arc span      7929 days (21.71 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57085  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:47:30  

Additional Information
 Earth MOID = .90969 au 
 Jupiter MOID = 2.9274 au 
 T_jup = 3.644 
[ 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 16.0   n/a MPO347864  
diameter diameter 2.079 km 0.385 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.178   0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49869 (1999 XG115)          Discovered 1999-Dec-12 by Billings, G. W. at Calgary
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XG115 = 1998 HE79 
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-29 18:28 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin