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 ]  
249604 (1999 HM12)
Classification: Main-belt Asteroid          SPK-ID: 2249604
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3127218405171744 3.8954e-08  
a 2.627109344843377 1.0058e-08 au
q 1.805554875284088 1.0232e-07 au
i 29.76945753806323 8.9873e-06 deg
node 10.36685634615984 7.6233e-06 deg
peri 108.0080213168847 1.6156e-05 deg
M 40.41653728822285 1.0481e-05 deg
tp 2458825.888737558434
(2019-Dec-08.38873756)
4.5327e-05 TDB
period 1555.305295718166
4.26
8.9322e-06
2.446e-08
d
yr
n .231465809954546 1.3293e-09 deg/d
Q 3.448663814402666 1.3204e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1113  
   data-arc span      7729 days (21.16 yr)  
   first obs. used      1999-04-15  
   last obs. used      2020-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47516  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:16:38  

Additional Information
 Earth MOID = .98708 au 
 Jupiter MOID = 2.09436 au 
 T_jup = 3.152 
[ 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 15.0   n/a MPO454851  

249604 (1999 HM12)          Discovered 1999-Apr-17 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Alternate Designations
 1999 HM12 = 2002 XB66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Dec-01 22:09 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin