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400 Ducrosa (A895 EC)
Classification: Main-belt Asteroid          SPK-ID: 2000400
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1158671969385083 2.1141e-08  
a 3.127493061674872 1.3083e-08 au
q 2.765119207173972 7.1323e-08 au
i 10.52656291076622 6.067e-07 deg
node 327.0278241117648 5.2856e-06 deg
peri 237.4286685609534 1.1963e-05 deg
M 255.487610410756 1.4139e-05 deg
tp 2459982.986792073415
(2023-Feb-07.48679207)
8.102e-05 TDB
period 2020.19345243407
5.53
1.2677e-05
3.471e-08
d
yr
n .1782007557574483 1.1182e-09 deg/d
Q 3.489866916175773 1.4599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2892  
   data-arc span      46047 days (126.07 yr)  
   first obs. used      1895-03-18  
   last obs. used      2021-04-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40244  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:00:45  

Additional Information
 Earth MOID = 1.78115 au 
 Jupiter MOID = 1.59141 au 
 T_jup = 3.178 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457464.5 (2016-Mar-17.0) TDB
Reference: JPL 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1165933502676952 2.102e-08  
q 2.761032755877814 7.0932e-08 au
tp 2457969.859384153929
(2017-Aug-04.35938415)
7.6637e-05 TDB
node 327.1435284259007 5.2781e-06 deg
peri 238.5315753454566 1.2103e-05 deg
i 10.53574997199948 6.0719e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2892  
   data-arc span      46047 days (126.07 yr)  
   first obs. used      1895-03-18  
   last obs. used      2021-04-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40244  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:00:45  

Additional Information
 Jupiter MOID = 1.59141 au 
 T_jup = 3.178 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.418349471673312E-16 -1.473791418045791E-15 -1.223042839677358E-12 1.065303921889204E-14 -1.70477151078024E-13 6.374297921388833E-16
q -1.473791418045791E-15 5.031279132573754E-15 4.121977287532839E-12 -3.450634276269134E-14 5.666266437129525E-13 -1.959588757638787E-15
tp -1.223042839677358E-12 4.121977287532839E-12 5.873179277324772E-9 -1.518030778863899E-11 8.368720483849559E-10 -7.477630920938634E-13
node 1.065303921889204E-14 -3.450634276269134E-14 -1.518030778863899E-11 2.785798936503555E-11 -2.88534927217843E-11 3.116676857381333E-13
peri -1.70477151078024E-13 5.666266437129525E-13 8.368720483849559E-10 -2.88534927217843E-11 1.46478454151322E-10 -4.150351374799451E-13
i 6.374297921388833E-16 -1.959588757638787E-15 -7.477630920938634E-13 3.116676857381333E-13 -4.150351374799451E-13 3.686775615767001E-13

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 10.65   n/a MPCxxxxx  
diameter diameter 36.001 km 0.390 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.8678 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2005) Minor Planet Bull. 32, 54-58.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 34-36.]
geometric albedo albedo 0.112   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

400 Ducrosa (A895 EC)          Discovered 1895-Mar-15 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A895 EC = 1939 BH = 1950 BC1 = 1950 BQ = 1950 CB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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