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 ]  
20734 (1999 XA169)
Classification: Main-belt Asteroid          SPK-ID: 2020734
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1959046113649952 2.3919e-08  
a 3.091348145589701 2.0878e-08 au
q 2.485738788534052 7.2639e-08 au
i 25.06746079973115 7.3945e-07 deg
node 71.62302972258126 1.1041e-06 deg
peri 225.4983759973227 2.9388e-06 deg
M 83.23387539873914 5.7148e-06 deg
tp 2458741.494469028042
(2019-Sep-14.99446903)
2.7204e-05 TDB
period 1985.273307992672
5.44
2.0112e-05
5.506e-08
d
yr
n .1813352340711211 1.837e-09 deg/d
Q 3.69695750264535 2.4968e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2476  
   data-arc span      15799 days (43.26 yr)  
   first obs. used      1977-12-07  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38005  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:29:25  

Additional Information
 Earth MOID = 1.52034 au 
 Jupiter MOID = 1.59874 au 
 T_jup = 3.053 
[ 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 12.54   n/a E2021B10  
diameter diameter 23.992 km 0.631 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.45988 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.044   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20734 (1999 XA169)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XA169 = 1977 XD2 = 1986 LZ = 1997 LX17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-14 15:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin