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 ]  
8988 (1979 MA4)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008988
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2133036490133354 3.2553e-08  
a 3.399701474438097 1.7751e-08 au
q 2.674532744384434 1.1396e-07 au
i 4.15882705427343 3.7817e-06 deg
node 187.4786062939702 4.5826e-05 deg
peri 146.5919649527773 4.644e-05 deg
M 171.2432243762126 9.8148e-06 deg
tp 2458111.393128433347
(2017-Dec-23.89312843)
5.7379e-05 TDB
period 2289.599925440663
6.27
1.7932e-05
4.91e-08
d
yr
n .1572327095226968 1.2315e-09 deg/d
Q 4.124870204491759 2.1537e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2614  
   data-arc span      23866 days (65.34 yr)  
   first obs. used      1955-11-19  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46071  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:09:07  

Additional Information
 Earth MOID = 1.66406 au 
 Jupiter MOID = 1.29728 au 
 T_jup = 3.106 
[ 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 12.56   n/a MPCxxxxx  
diameter diameter 15.643 km 0.338 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.087   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8988 (1979 MA4)          Discovered 1979-Jun-25 by Helin, E. F., Bus, S. J. at Siding Spring
Reference: 19980808/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1979 MA4 = 1942 VA = 1986 TJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-14 10:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin