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 ]  
101219 (1998 SM55)
Classification: Main-belt Asteroid          SPK-ID: 2101219
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1741002048127006 4.6985e-08  
a 2.773834077439114 1.5431e-08 au
q 2.290908996440516 1.3244e-07 au
i 3.171405785519066 5.6278e-06 deg
node 2.766825990696046 8.12e-05 deg
peri 36.12147094062451 8.2431e-05 deg
M 221.8222507187004 1.6679e-05 deg
tp 2459648.171459062950
(2022-Mar-09.67145906)
8.1799e-05 TDB
period 1687.404278007132
4.62
1.408e-05
3.855e-08
d
yr
n .213345435170503 1.7802e-09 deg/d
Q 3.256759158437712 1.8117e-08 au
  Orbit Determination Parameters
   # obs. used (total)      672  
   data-arc span      7974 days (21.83 yr)  
   first obs. used      1998-09-14  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59364  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:01:46  

Additional Information
 Earth MOID = 1.29944 au 
 Jupiter MOID = 2.17358 au 
 T_jup = 3.312 
[ 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 15.3   n/a MPO385425  
diameter diameter 5.140 km 0.250 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101219 (1998 SM55)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 SM55 = 2000 CQ 
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 00:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin