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 ]  
25455 Anissamak (1999 XP12)
Classification: Main-belt Asteroid          SPK-ID: 2025455
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07521397227916823 3.8634e-08  
a 2.416054997195543 9.7065e-09 au
q 2.234333903611531 9.5346e-08 au
i 5.304302692740549 4.6999e-06 deg
node 182.2288849504983 3.7817e-05 deg
peri 218.0045037907998 4.6546e-05 deg
M 106.1624522914298 2.8012e-05 deg
tp 2458195.992021508280
(2018-Mar-18.49202151)
0.00010617 TDB
period 1371.698459425801
3.76
8.2662e-06
2.263e-08
d
yr
n .262448351914529 1.5816e-09 deg/d
Q 2.597776090779555 1.0437e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1540  
   data-arc span      9541 days (26.12 yr)  
   first obs. used      1993-03-20  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5191  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:21:23  

Additional Information
 Earth MOID = 1.2434 au 
 Jupiter MOID = 2.6817 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 14.9   n/a MPO474100  

25455 Anissamak           Discovered 1999 Dec. 5 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Anissa Yuenming Mak (b. 1991) is a finalist in the 2009 Intel Science Talent Search (STS), a science competition for high school seniors, for her mathematics project. She attends the Stuyvesant High School, New York, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090311/MPCPages.arcLast Updated: 2009-03-12

[ show close-approach data ]
Alternate Designations
 1999 XP12 = 1997 GA18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-28 23:11 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin