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2958 Arpetito (1981 DG)
Classification: Main-belt Asteroid          SPK-ID: 2002958
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01278039499893347 2.1822e-08  
a 2.872455638905583 1.1243e-08 au
q 2.835744521223456 6.5265e-08 au
i 1.021590648141076 1.0639e-06 deg
node 297.471069030676 5.1918e-05 deg
peri 316.2393344686332 9.9578e-05 deg
M 325.3127997416464 6.6483e-05 deg
tp 2459371.834637175031
(2021-Jun-06.33463717)
0.00032815 TDB
period 1778.191059630329
4.87
1.044e-05
2.858e-08
d
yr
n .2024529355551034 1.1887e-09 deg/d
Q 2.909166756587711 1.1387e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3120  
   data-arc span      18741 days (51.31 yr)  
   first obs. used      1969-11-05  
   last obs. used      2021-02-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43412  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:30:30  

Additional Information
 Earth MOID = 1.81898 au 
 Jupiter MOID = 2.06706 au 
 T_jup = 3.297 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456844.5 (2014-Jul-06.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01430694686652713 2.0426e-08  
q 2.833986080576091 6.0926e-08 au
tp 2457540.669616170820
(2016-Jun-01.16961617)
0.00032979 TDB
node 297.623080968471 5.1707e-05 deg
peri 305.6403364242228 9.7505e-05 deg
i 1.024178747106999 1.0645e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3120  
   data-arc span      18741 days (51.31 yr)  
   first obs. used      1969-11-05  
   last obs. used      2021-02-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43412  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:30:30  

Additional Information
 Jupiter MOID = 2.06706 au 
 T_jup = 3.297 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.172267653695466E-16 -1.224077719228379E-15 3.449284568457458E-12 7.980728243420165E-14 6.540820010354518E-13 1.836049309202771E-15
q -1.224077719228379E-15 3.71203160589725E-15 -1.078542433604369E-11 -2.378113148971189E-13 -2.055521500599996E-12 -5.830007684774535E-15
tp 3.449284568457458E-12 -1.078542433604369E-11 1.087611021959692E-7 -5.382448092360696E-9 2.783300375903193E-8 -1.035707709485171E-10
node 7.980728243420165E-14 -2.378113148971189E-13 -5.382448092360696E-9 2.673637765399552E-9 -3.771996175914975E-9 1.074225686128293E-11
peri 6.540820010354518E-13 -2.055521500599996E-12 2.783300375903193E-8 -3.771996175914975E-9 9.507146619395174E-9 -3.137667975813417E-11
i 1.836049309202771E-15 -5.830007684774535E-15 -1.035707709485171E-10 1.074225686128293E-11 -3.137667975813417E-11 1.133159154332381E-12

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 12.51   n/a E2021B10  
diameter diameter 8.916 km 0.244 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.293   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2958 Arpetito (1981 DG)          Discovered 1981-Feb-28 by Debehogne, H. at La Silla
and G. de Sanctis.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 DG = 1969 VJ = 1972 HM = 1974 WQ = 1976 JA = 1979 YA2 = 1983 RQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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