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

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456969.5 (2014-Nov-08.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1359682554965254 3.7526e-08  
q 2.449769068502106 1.0804e-07 au
tp 2457833.130283332482
(2017-Mar-20.63028333)
7.6745e-05 TDB
node 254.2204962545404 1.6783e-05 deg
peri 157.09560809987 2.268e-05 deg
i 14.25066215935079 4.2864e-06 deg
  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
 Jupiter MOID = 2.13903 au 
 T_jup = 3.252 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.408165396476859E-15 -4.030262785670741E-15 -3.134500683599788E-13 2.72702978980028E-16 -6.11398940625755E-14 -1.781808889722251E-15
q -4.030262785670741E-15 1.167266738390547E-14 1.144262781466214E-12 -7.037809132678862E-17 2.081122564481695E-13 5.559032925190078E-15
tp -3.134500683599788E-13 1.144262781466214E-12 5.889780332530967E-9 4.149856246005506E-12 1.186297008315596E-9 2.523718411736732E-12
node 2.72702978980028E-16 -7.037809132678862E-17 4.149856246005506E-12 2.81685050346246E-10 -2.719078955369997E-10 -7.144592937094382E-12
peri -6.11398940625755E-14 2.081122564481695E-13 1.186297008315596E-9 -2.719078955369997E-10 5.143807117049824E-10 7.368707810580844E-12
i -1.781808889722251E-15 5.559032925190078E-15 2.523718411736732E-12 -7.144592937094382E-12 7.368707810580844E-12 1.837304212699642E-11

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 ]
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