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 ]  
3221 Changshi (1981 XF2)
Classification: Main-belt Asteroid          SPK-ID: 2003221
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1536280575285813 2.4929e-08  
a 2.204018650862031 5.7051e-09 au
q 1.865419546773333 5.3667e-08 au
i 3.651179848549437 3.2665e-06 deg
node 78.60842390088446 5.1604e-05 deg
peri 233.2028077718088 5.3298e-05 deg
M 18.55776645026341 1.3567e-05 deg
tp 2458938.890947624679
(2020-Mar-30.39094762)
4.5027e-05 TDB
period 1195.14699759576
3.27
4.6405e-06
1.27e-08
d
yr
n .3012181771147825 1.1696e-09 deg/d
Q 2.54261775495073 6.5816e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2881  
   data-arc span      24780 days (67.84 yr)  
   first obs. used      1953-01-12  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40936  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:10:56  

Additional Information
 Earth MOID = .853855 au 
 Jupiter MOID = 2.70283 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 13.0   n/a MPO384780  
diameter diameter 5.998 km 0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.373   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3221 Changshi (1981 XF2)          Discovered 1981-Dec-02 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1927-Feb-21 19:30 00:02 Amphi 0.0047584863177781 0.00475389712906358 0.00476307816212515 3.36183187059005 3.36183151123128 2424933.312692044 1.82706368406552 290.322799116528 30.8566603682198 -38.2643870810765 14402.3635411399 T 35 CATAB v2.0f-lin.ifort 2020-Dec-18 02:11:04 2020-Dec-18 02:11

Alternate Designations
 1981 XF2 = 1954 KG = 1954 LJ = 1970 GU1 = 1973 DO = 1974 RS1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-26 03:37 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin