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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1162922533653355 4.2354e-08  
a 3.125963686257175 1.4441e-08 au
q 2.762438325244117 1.3346e-07 au
i 10.52669869363427 4.4079e-06 deg
node 327.0328661733673 2.3025e-05 deg
peri 237.5765350497996 2.8961e-05 deg
M 184.7399827791543 2.0005e-05 deg
tp 2459983.276286999876
(2023-Feb-07.77628700)		 0.00011534 TDB
period 2018.711791372996
5.53		 1.3988e-05
3.83e-08		 d
yr
n .1783315486333745 1.2357e-09 deg/d
Q 3.489489047270232 1.612e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2529  
   data-arc span      45899 days (125.66 yr)  
   first obs. used      1895-03-18  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42399  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:53:18  

Additional Information
 Earth MOID = 1.77779 au 
 Jupiter MOID = 1.59404 au 
 T_jup = 3.178 
[ show covariance matrix ]

[ 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 10.5   n/a MPO265957  
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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1902-Dec-30 03:33 00:02 Jupiter 1.75328213621132 1.75328074322292 1.75328352921279 3.84577017430962 3.71802832708938 2416113.647897131 2.40827849392986 273.503052974444 21.9568321089623 77.3339283453127 2362860.22421131 T 45 CATAB v2.0f-lin.ifort 2020-Dec-18 01:53:23 2020-Dec-18 01:53
1965-Nov-18 15:12 00:01 Jupiter 1.9955267781832 1.99552605305583 1.99552750331056 3.32627144484276 3.19611647198614 2439083.133235849 1.17591071383169 66.8376965472478 26.7573591418226 87.9025911973363 2242332.13063207 T 45 CATAB v2.0f-lin.ifort 2020-Dec-18 01:53:23 2020-Dec-18 01:53
1975-Dec-21 13:27 00:01 Jupiter 1.6777954077221 1.67779481193025 1.67779600351395 2.11926690766125 1.86590651464178 2442768.060322876 1.03574558066523 215.752538304527 37.8350138437937 77.6393158081184 2755226.69727404 T 45 CATAB v2.0f-lin.ifort 2020-Dec-18 01:53:23 2020-Dec-18 01:53
1986-Mar-31 02:10 < 00:01 Jupiter 1.71899699945157 1.71899651560246 1.71899748330213 3.73514783713189 3.60081168457822 2446520.590028667 0.617782135424565 153.955207165107 15.8120015466818 84.4399229803403 2946556.77896359 T 45 CATAB v2.0f-lin.ifort 2020-Dec-18 01:53:23 2020-Dec-18 01:53
2059-Apr-12 14:31 00:01 Jupiter 1.71102929443051 1.71102873065217 1.71102985820933 1.79020862079206 1.48821142599532 2473196.104889362 1.23217717391141 109.645430257686 62.8791233870975 50.019990186446 2350974.44705613 T 45 CATAB v2.0f-lin.ifort 2020-Dec-18 01:53:23 2020-Dec-18 01:53
2069-Jul-03 11:28 00:01 Jupiter 1.68132399896561 1.68132343042955 1.68132456750444 3.55410264513421 3.40941043755247 2476930.977502130 1.261743285728 198.402343748174 16.9477370933261 84.8802832625736 2322021.34431054 T 45 CATAB v2.0f-lin.ifort 2020-Dec-18 01:53:23 2020-Dec-18 01:53
2142-Aug-08 18:45 00:04 Jupiter 1.74715197025319 1.74715096923543 1.74715297127403 1.63911070317902 1.3103740640219 2503629.281117243 3.51952174630732 167.856449700421 60.3894908635496 -88.5987534484437 2282675.53669399 T 45 CATAB v2.0f-lin.ifort 2020-Dec-18 01:53:23 2020-Dec-18 01:53
2152-Oct-06 14:44 00:03 Jupiter 1.66555493074397 1.66555410861219 1.66555575287906 3.33560069939934 3.17948526577009 2507341.114038435 3.15230275462072 247.517545300418 19.2399840697011 85.4092443664459 1184801.4644837 T 45 CATAB v2.0f-lin.ifort 2020-Dec-18 01:53:23 2020-Dec-18 01:53

Alternate Designations
 A895 EC = 1939 BH = 1950 BC1 = 1950 BQ = 1950 CB 
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