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1200 Imperatrix (1931 RH)
Classification: Main-belt Asteroid          SPK-ID: 2001200
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1053375864996101 2.9307e-08  
a 3.063477447683899 1.262e-08 au
q 2.740778127048892 9.2148e-08 au
i 4.593862753012946 4.1883e-06 deg
node 204.7526006608687 4.3329e-05 deg
peri 52.02924680698665 4.7963e-05 deg
M 298.0741358475528 2.0828e-05 deg
tp 2459337.391484147385
(2021-May-02.89148415)
0.00011328 TDB
period 1958.485940454427
5.36
1.2102e-05
3.313e-08
d
yr
n .1838154630389991 1.1359e-09 deg/d
Q 3.386176768318907 1.395e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2975  
   data-arc span      38290 days (104.83 yr)  
   first obs. used      1915-10-02  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4321  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:29:53  

Additional Information
 Earth MOID = 1.72907 au 
 Jupiter MOID = 1.65791 au 
 T_jup = 3.220 
[ 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 10.9   n/a MPO384757  
diameter diameter 42.006 km 0.390 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 17.769 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.065   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1200 Imperatrix (1931 RH)          Discovered 1931-Sep-14 by Reinmuth, K. at Heidelberg
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
1905-Dec-30 02:00 00:02 Jupiter 1.66306372339921 1.66306321535275 1.663064231447 2.20656564435323 1.96221886807975 2417209.583528682 2.09964262029872 101.687998281032 21.4665980187886 79.2497256844324 3198103.10555519 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
1915-Jul-07 09:32 00:02 Jupiter 1.95020524966193 1.95020428266107 1.95020621666389 3.39136279628385 3.26078088882893 2420685.897059058 1.83045822281255 96.7083929496548 14.2121264873395 -68.140619224401 3192552.17362847 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
1954-Dec-15 13:34 00:01 Jupiter 1.98402208962352 1.98402140725599 1.98402277199094 2.78158838035978 2.62362155841887 2435092.065330419 1.14089207427041 48.2950929990646 23.4386672372564 -80.5079607067464 2886323.2893886 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
1964-Jun-18 05:42 < 00:01 Jupiter 1.65230611587821 1.65230573408622 1.65230649767011 2.37096535522619 2.1438786600593 2438564.737640440 0.947704664012291 62.7761752241708 14.9784987445145 -86.5241374560478 2544888.39379287 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
2013-Jun-02 02:51 < 00:01 Jupiter 1.76237679313584 1.76237647381326 1.76237711245852 2.23608406344723 2.00968764810556 2456445.618567278 0.191612374360173 50.5121271060967 12.370267591157 85.9729223354256 3702497.71346116 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
2022-Dec-04 13:42 < 00:01 Jupiter 1.8014259542079 1.80142553328965 1.80142637512605 2.89267490534742 2.72528474736053 2459918.071171222 0.272767668489303 31.7728834674964 13.3855759862679 -78.3154095160046 3010850.80732166 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
2071-Nov-17 10:33 00:01 Jupiter 1.64302753138347 1.64302720234449 1.64302786042254 2.19599247741075 1.94713431758173 2477797.939460470 1.16618668678583 73.8483987365476 18.560793188553 87.1134177113044 2933846.38968332 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
2120-Nov-06 04:50 00:02 Jupiter 1.90266167243615 1.90266056220019 1.90266278267179 2.47875405198769 2.29213138437922 2495683.701052919 2.10793863730531 56.1340147334755 28.1115070808322 -70.6799171734964 1851190.58830163 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
2130-May-09 07:43 00:02 Jupiter 1.68904143275034 1.68904069339664 1.68904217210653 2.52451366698875 2.31737067927373 2499154.821260892 2.32135914850683 135.037748834633 12.9029383990434 -83.1692672943446 2552160.57622986 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
2179-Apr-23 15:11 00:03 Jupiter 1.71244375376456 1.71244267241006 1.71244483511984 2.11514505028688 1.86670370332157 2517036.132923896 3.31212477177045 93.0001020836768 26.1010325956968 66.1713754441109 3241514.19339564 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30
2188-Oct-28 15:24 00:03 Jupiter 1.87143637793237 1.87143462821962 1.87143812765077 3.20766844739177 3.0633193992811 2520512.141721860 3.40968862447036 191.869236328472 14.4733763769517 -69.7725655737351 3016378.00347391 T 48 CATAB v2.0f-lin.ifort 2020-Aug-24 22:30:10 2020-Aug-24 22:30

Alternate Designations
 1931 RH = 1929 CX = 1950 DC1 = 1957 OY = A913 EC = A915 TL = A924 GC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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