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1302 Werra (A924 SE)
Classification: Main-belt Asteroid          SPK-ID: 2001302
[ 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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1749679265949972 1.7737e-08  
a 3.112181149932316 1.1734e-08 au
q 2.567649266940625 5.5e-08 au
i 2.595779740286796 1.2979e-06 deg
node 90.13315554367249 1.9316e-05 deg
peri 354.2935748901029 2.0031e-05 deg
M 107.5604780001896 7.2754e-06 deg
tp 2458601.335668749285
(2019-Apr-27.83566875)		 3.8934e-05 TDB
period 2005.375610639041
5.49		 1.1342e-05
3.105e-08		 d
yr
n .1795174919302429 1.0153e-09 deg/d
Q 3.656713032924008 1.3788e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3276  
   data-arc span      35223 days (96.44 yr)  
   first obs. used      1924-09-28  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42295  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 12:26:13  

Additional Information
 Earth MOID = 1.58347 au 
 Jupiter MOID = 1.57679 au 
 T_jup = 3.193 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456786.5 (2014-May-09.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1757947651496659 1.7767e-08  
q 2.567422342388908 5.525e-08 au
tp 2456599.441566410269
(2013-Nov-02.94156641)		 3.5319e-05 TDB
node 90.16040034400376 1.9289e-05 deg
peri 355.0802170001698 1.9978e-05 deg
i 2.596481065622125 1.2984e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3276  
   data-arc span      35223 days (96.44 yr)  
   first obs. used      1924-09-28  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42295  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 12:26:13  

Additional Information
 Jupiter MOID = 1.57679 au 
 T_jup = 3.193 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.156521870053159E-16 -9.667637055041631E-16 2.485383258950819E-13 -5.135254221851599E-14 6.989663010715297E-14 4.605117646714647E-15
q -9.667637055041631E-16 3.05253278354158E-15 -7.220177014136139E-13 1.56237196317906E-13 -2.021870007414298E-13 -1.400192897147052E-14
tp 2.485383258950819E-13 -7.220177014136139E-13 1.247426992748974E-9 -9.872338172131782E-12 1.814912971016248E-10 -4.959912799292879E-14
node -5.135254221851599E-14 1.56237196317906E-13 -9.872338172131782E-12 3.720729910783559E-10 -3.729279153713337E-10 -2.253115282699985E-11
peri 6.989663010715297E-14 -2.021870007414298E-13 1.814912971016248E-10 -3.729279153713337E-10 3.991168827225308E-10 2.245823068929827E-11
i 4.605117646714647E-15 -1.400192897147052E-14 -4.959912799292879E-14 -2.253115282699985E-11 2.245823068929827E-11 1.685913057915337E-12

[ 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 11.05   n/a E2021B10  
diameter diameter 35.041 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.183 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.076   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1302 Werra (A924 SE)          Discovered 1924-Sep-28 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
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
1900-Aug-30 17:15 00:02 Jupiter 1.68925530294 1.68925461174263 1.68925599413669 1.5827727838618 1.2256974654996 2415262.218927535 2.20178191279487 59.4911999644785 21.693484772076 -30.7990823908896 2986910.25476735 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27
1962-Sep-24 10:11 00:01 Jupiter 1.8592962216431 1.85929567419834 1.85929676908796 2.95952263392286 2.80136619810944 2437931.924448975 1.03690820434049 45.3301487847292 6.02410795959117 71.6868836910682 4876519.7950856 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27
1972-Nov-09 05:04 < 00:01 Jupiter 1.6023131751778 1.60231298375427 1.60231336660124 1.47887852659758 1.06293558315574 2441630.711123678 0.830978530077092 61.6821287657986 29.0619145758 -23.6067613447657 4570986.16577016 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27
1983-Jan-05 22:40 < 00:01 Jupiter 1.85772520432037 1.85772490451597 1.85772550412476 2.07806334338123 1.8456584485213 2445340.444406493 0.595897647671878 27.3902860987932 3.2411517221294 88.7962237332328 6444157.96222052 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27
2045-Jan-25 15:53 < 00:01 Jupiter 1.69280558253942 1.69280540863969 1.69280575643915 2.02549993114713 1.76122621623789 2468006.162000951 0.588512542586581 29.9086378277475 6.90656673801779 -83.7688964236814 5436557.72439261 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27
2055-Mar-16 14:45 < 00:01 Jupiter 1.65911611340319 1.65911578172933 1.65911644507678 1.53348582771201 1.15348431156374 2471708.114477434 0.788865122134446 43.3167038905454 18.2270140513507 -11.3464580457577 3737063.95555621 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27
2117-Apr-13 08:10 00:02 Jupiter 1.89746189794301 1.89746102709967 1.89746276878743 3.20714064152077 3.06479294761939 2494380.840058685 1.93925406217079 87.1284271234022 6.08953264401215 71.7575214538669 5943910.93749737 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27
2127-May-29 06:46 00:02 Jupiter 1.59285255721935 1.59285237429554 1.59285274014316 1.50241429116236 1.092574762523 2498078.781680589 2.19313923018543 123.574626156173 39.6484005401322 -53.2629841468254 4421300.61111611 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27
2137-Jul-22 19:16 00:02 Jupiter 1.81119687430208 1.81119570190719 1.81119804669666 1.95716314874873 1.70151978959602 2501786.302916031 2.37340100073966 72.4468473440001 5.79369999602988 -85.8887476142998 5722583.13413659 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27
2199-Aug-16 21:13 00:04 Jupiter 1.70680324951892 1.70680193943521 1.70680455960449 2.16428882316297 1.92135916219713 2524456.383815113 3.65499884791519 142.527287675263 5.22041988498745 -81.3857898819446 3714080.35832207 T 38 CATAB v2.0f-lin.ifort 2021-Mar-16 12:27:21 2021-Mar-16 12:27

Alternate Designations
 A924 SE = 1930 WD 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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