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 ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .116045365910631 2.1114e-08  
a 3.126753627012401 1.3081e-08 au
q 2.763908358253354 7.1216e-08 au
i 10.52650517421395 6.0676e-07 deg
node 327.0295178807638 5.2866e-06 deg
peri 237.5172618194145 1.1959e-05 deg
M 220.4668891683441 1.4041e-05 deg
tp 2459983.233094171377
(2023-Feb-07.73309417)
8.0977e-05 TDB
period 2019.477041844661
5.53
1.2673e-05
3.47e-08
d
yr
n .1782639725733962 1.1187e-09 deg/d
Q 3.489598895771447 1.46e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2837  
   data-arc span      46025 days (126.01 yr)  
   first obs. used      1895-03-18  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40434  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:20:48  

Additional Information
 Earth MOID = 1.77851 au 
 Jupiter MOID = 1.59273 au 
 T_jup = 3.178 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457450.5 (2016-Mar-03.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1165875579337861 2.102e-08  
q 2.761036853537207 7.0935e-08 au
tp 2457969.874184342190
(2017-Aug-04.37418434)
7.6641e-05 TDB
node 327.1435443242911 5.2783e-06 deg
peri 238.5341259492608 1.2103e-05 deg
i 10.53574723647903 6.0726e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2837  
   data-arc span      46025 days (126.01 yr)  
   first obs. used      1895-03-18  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40434  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:20:48  

Additional Information
 Jupiter MOID = 1.59273 au 
 T_jup = 3.178 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.418203967748419E-16 -1.473804138374205E-15 -1.223110393481303E-12 1.065441160367765E-14 -1.704873693460789E-13 6.375465783706791E-16
q -1.473804138374205E-15 5.031773736349742E-15 4.122557339396739E-12 -3.451358214835711E-14 5.666907340903043E-13 -1.959346077248102E-15
tp -1.223110393481303E-12 4.122557339396739E-12 5.873859087839232E-9 -1.518184367512133E-11 8.36958638003462E-10 -7.476015029601848E-13
node 1.065441160367765E-14 -3.451358214835711E-14 -1.518184367512133E-11 2.786000167373834E-11 -2.88554591168265E-11 3.120375555485186E-13
peri -1.704873693460789E-13 5.666907340903043E-13 8.36958638003462E-10 -2.88554591168265E-11 1.46492835704553E-10 -4.154254184907313E-13
i 6.375465783706791E-16 -1.959346077248102E-15 -7.476015029601848E-13 3.120375555485186E-13 -4.154254184907313E-13 3.687634098273696E-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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-19 15:22 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin