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 ]  
79845 (1998 XR2)
Classification: Main-belt Asteroid          SPK-ID: 2079845
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1119978944845624 2.7222e-08  
a 2.406505969875178 8.0217e-09 au
q 2.136982368184628 6.5279e-08 au
i 5.794595566048775 4.2438e-06 deg
node 328.9347546163798 3.9625e-05 deg
peri 314.3809577672978 4.5855e-05 deg
M 99.90533267317393 2.3123e-05 deg
tp 2458822.087902931768
(2019-Dec-04.58790293)
8.7374e-05 TDB
period 1363.574408887815
3.73
6.8179e-06
1.867e-08
d
yr
n .264011994984293 1.3201e-09 deg/d
Q 2.676029571565727 8.9201e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1214  
   data-arc span      9127 days (24.99 yr)  
   first obs. used      1996-02-15  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52175  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:43:59  

Additional Information
 Earth MOID = 1.12347 au 
 Jupiter MOID = 2.47003 au 
 T_jup = 3.507 
[ 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 15.42   n/a E2021B10  
rotation period rot_per 1.2 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

79845 (1998 XR2)          Discovered 1998-Dec-07 by Farra d'Isonzo at Farra d'Isonzo
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

[ show close-approach data ]
Alternate Designations
 1998 XR2 = 2000 EM16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-14 02:36 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin