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 ]  
181704 (1989 NA)
Classification: Mars-crossing Asteroid          SPK-ID: 2181704
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4538788037608691 2.6952e-08  
a 2.642405134731333 8.4021e-09 au
q 1.443073453127898 7.3168e-08 au
i 14.16429670854106 4.8862e-06 deg
node 96.91333857938533 1.9459e-05 deg
peri 202.0901748348911 2.1158e-05 deg
M 107.7232100368216 6.4406e-06 deg
tp 2458731.033811367981
(2019-Sep-04.53381137)
2.7054e-05 TDB
period 1568.908203253107
4.30
7.4831e-06
2.049e-08
d
yr
n .2294589315382159 1.0944e-09 deg/d
Q 3.841736816334769 1.2216e-08 au
  Orbit Determination Parameters
   # obs. used (total)      658  
   data-arc span      25787 days (70.60 yr)  
   first obs. used      1950-04-18  
   last obs. used      2020-11-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46896  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:31:41  

Additional Information
 Earth MOID = .435209 au 
 Jupiter MOID = 1.43939 au 
 T_jup = 3.201 
[ 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 15.91   n/a MPCxxxxx  
diameter diameter 1.642 km 0.296 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.335   0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

181704 (1989 NA)          Discovered 1989-Jul-02 by Helin, E. F. at Palomar
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-16 01:01 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin