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 ]  
173991 (2001 XR170)
Classification: Main-belt Asteroid          SPK-ID: 2173991
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1848239410653002 4.6741e-08  
a 3.146210431114908 2.2113e-08 au
q 2.564715419815494 1.5007e-07 au
i .2677842279551363 5.4778e-06 deg
node 131.3325349504643 0.001101 deg
peri 262.1913955976926 0.0011011 deg
M 145.8474302511455 1.5229e-05 deg
tp 2458174.697187754989
(2018-Feb-25.19718775)
8.2978e-05 TDB
period 2038.356191098327
5.58
2.149e-05
5.884e-08
d
yr
n .1766129009111118 1.862e-09 deg/d
Q 3.727705442414322 2.62e-08 au
  Orbit Determination Parameters
   # obs. used (total)      466  
   data-arc span      9004 days (24.65 yr)  
   first obs. used      1995-09-03  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55096  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:34:20  

Additional Information
 Earth MOID = 1.57108 au 
 Jupiter MOID = 1.70943 au 
 T_jup = 3.182 
[ 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 15.6   n/a MPO254223  
rotation period rot_per 9.132 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:
[Masiero, J.; Jedicke, R.; Durecy, J.; Gwyn, S.; et al. (2009) Icarus 204, 145-171.]
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

173991 (2001 XR170)          Discovered 2001-Dec-14 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ 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-Oct-28 12:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin