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4030 Archenhold (1984 EO1)
Classification: Main-belt Asteroid          SPK-ID: 2004030
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09286801646285764 1.4217e-08  
a 2.459881130231035 7.5513e-09 au
q 2.231436848932067 3.5031e-08 au
i 6.531892160559556 6.7544e-07 deg
node 342.295545753911 3.1447e-06 deg
peri 302.69639442 1.1763e-05 deg
M 131.1115246914068 9.4017e-06 deg
tp 2458883.274796646349
(2020-Feb-03.77479665)
3.6798e-05 TDB
period 1409.190180971358
3.86
6.4888e-06
1.777e-08
d
yr
n .2554658731384653 1.1763e-09 deg/d
Q 2.688325411530004 8.2526e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2746  
   data-arc span      23845 days (65.28 yr)  
   first obs. used      1955-11-11  
   last obs. used      2021-02-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4156  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:14:03  

Additional Information
 Earth MOID = 1.22298 au 
 Jupiter MOID = 2.45753 au 
 T_jup = 3.476 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457307.5 (2015-Oct-12.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09240276601168779 1.4326e-08  
q 2.232681273686853 3.5392e-08 au
tp 2457475.866515522831
(2016-Mar-28.36651552)
3.7556e-05 TDB
node 342.3606075901893 3.146e-06 deg
peri 303.24203333245 1.1734e-05 deg
i 6.530100085151032 6.7537e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2746  
   data-arc span      23845 days (65.28 yr)  
   first obs. used      1955-11-11  
   last obs. used      2021-02-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4156  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:14:03  

Additional Information
 Jupiter MOID = 2.45753 au 
 T_jup = 3.476 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.052439704449484E-16 -4.973639612273182E-16 3.732693762513853E-13 -4.382968270558972E-16 1.138690094268384E-13 2.573078202959413E-15
q -4.973639612273182E-16 1.252595988183427E-15 -9.737465809386469E-13 1.911854589944211E-15 -2.969349868217411E-13 -6.20811634503564E-15
tp 3.732693762513853E-13 -9.737465809386469E-13 1.410425947441521E-9 -2.68092820113713E-11 4.263483459716124E-10 -1.715946464587857E-12
node -4.382968270558972E-16 1.911854589944211E-15 -2.68092820113713E-11 9.897083289721349E-12 -1.673757149375589E-11 8.482695110598777E-13
peri 1.138690094268384E-13 -2.969349868217411E-13 4.263483459716124E-10 -1.673757149375589E-11 1.376891000173422E-10 -1.117902108848415E-12
i 2.573078202959413E-15 -6.20811634503564E-15 -1.715946464587857E-12 8.482695110598777E-13 -1.117902108848415E-12 4.561183388103258E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.14   n/a E2021B10  
diameter diameter 6.973 km 0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.27341 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.251   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4030 Archenhold           Discovered 1984 Mar. 2 by H. Debehogne at the European Southern Observatory.
Named in memory of the German astronomer Friedrich Simon Archenhold (1861-1939). In 1896 he made it possible to build the world's longest refractor (focal length 21 meters), which is still in use at the Archenhold Observatory in Berlin---Europe's first public observatory. As its first director Archenhold had the aim of introducing astronomy to everyone. Name suggested by A. Gnädig and A. Doppler and endorsed by L. D. Schmadel.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1984 EO1 = 1970 SO = 1980 DP2 = 1980 ET 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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