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 ]  
4162 SAF (1940 WA)
Classification: Main-belt Asteroid          SPK-ID: 2004162
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1321852721345975 3.7289e-08  
a 2.839822190290232 1.4114e-08 au
q 2.464439521252849 1.068e-07 au
i 14.21979241600057 4.2778e-06 deg
node 254.1359383300306 1.6827e-05 deg
peri 157.15482729 2.3091e-05 deg
M 281.7965431864187 1.7108e-05 deg
tp 2459580.215739439784
(2021-Dec-31.71573944)
8.4214e-05 TDB
period 1747.974728587476
4.79
1.3031e-05
3.568e-08
d
yr
n .205952634275733 1.5354e-09 deg/d
Q 3.215204859327615 1.598e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2521  
   data-arc span      29241 days (80.06 yr)  
   first obs. used      1940-11-29  
   last obs. used      2020-12-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41313  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:01:14  

Additional Information
 Earth MOID = 1.48159 au 
 Jupiter MOID = 2.13903 au 
 T_jup = 3.252 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.75   n/a E2021B10  
diameter diameter 24.768 km 0.474 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.5 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.049   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4162 SAF (1940 WA)          Discovered 1940-Nov-24 by Patry, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1940 WA = 1951 AS1 = 1987 OP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-12 12:58 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin