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 ]  
71212 (1999 XX257)
Classification: Main-belt Asteroid          SPK-ID: 2071212
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1494777646649826 3.5987e-08  
a 2.699763200686464 1.5552e-08 au
q 2.296208632323072 9.5142e-08 au
i 12.91474803716677 5.5022e-06 deg
node 58.46378050291943 2.0192e-05 deg
peri 69.67502091513137 2.8688e-05 deg
M 120.2472924674637 1.9949e-05 deg
tp 2458059.297564196675
(2017-Nov-01.79756420)
8.8853e-05 TDB
period 1620.268306181736
4.44
1.4e-05
3.833e-08
d
yr
n .2221854236279932 1.9198e-09 deg/d
Q 3.103317769049855 1.7877e-08 au
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      13745 days (37.63 yr)  
   first obs. used      1980-09-30  
   last obs. used      2018-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4862  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 15:18:56  

Additional Information
 Earth MOID = 1.3485 au 
 Jupiter MOID = 2.11425 au 
 T_jup = 3.316 
[ 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 14.4   n/a MPO436281  

71212 (1999 XX257)          Discovered 1999-Dec-07 by CSS at Catalina
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ 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
1951-Jan-06 23:31 00:02 Amphi 0.0286970312666198 0.0286905730429813 0.0287034921970696 4.80815791482661 4.80815787316296 2433653.480063937 1.66872915297888 547.621719017766 40.9607225767057 54.2056993787043 85103.2783839222 T 22 CATAB v2.0e-lin.ifort 2018-May-31 15:19:02 2018-Dec-17 17:09
1961-Jul-10 10:37 < 00:01 Hygie 0.0471108624084616 0.0471068225676543 0.0471149032821847 5.71724469669947 5.71724455325144 2437490.942672970 0.711058299279454 410.16674143339 46.8251440572334 -61.2822065674357 132136.294369603 T 22 CATAB v2.0e-lin.ifort 2018-May-31 15:19:02 2018-Dec-17 17:09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin