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 ]  
20464 (1999 MD1)
Classification: Main-belt Asteroid          SPK-ID: 2020464
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1711599484649815 4.161e-08  
a 2.326029643798701 9.1326e-09 au
q 1.927906529838096 9.9029e-08 au
i 6.080498957548099 5.4429e-06 deg
node 159.9709324677345 3.7375e-05 deg
peri 249.0168687454485 4.0478e-05 deg
M 280.691462464033 1.7528e-05 deg
tp 2459485.955710511024
(2021-Sep-28.45571051)
6.3992e-05 TDB
period 1295.750230388051
3.55
7.6312e-06
2.089e-08
d
yr
n .2778313223931956 1.6363e-09 deg/d
Q 2.724152757759306 1.0696e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1172  
   data-arc span      10667 days (29.20 yr)  
   first obs. used      1991-05-06  
   last obs. used      2020-07-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56672  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:21:46  

Additional Information
 Earth MOID = .946581 au 
 Jupiter MOID = 2.66947 au 
 T_jup = 3.547 
[ 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 15.27   n/a E2021B10  
diameter diameter 2.163 km 0.499 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.344   0.270 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20464 (1999 MD1)          Discovered 1999-Jun-24 by Zoltowski, F. B. at Woomera
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 MD1 = 1998 FX146 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-17 23:54 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin