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1814 Bach (1931 TW1)
Classification: Main-belt Asteroid          SPK-ID: 2001814
[ 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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .130121055502672 2.933e-08  
a 2.227015339581531 5.7884e-09 au
q 1.937233752974541 6.4552e-08 au
i 4.344405256228883 4.3311e-06 deg
node 20.27021135849946 4.2363e-05 deg
peri 65.65196808516608 4.6083e-05 deg
M 193.8225013797228 1.9019e-05 deg
tp 2459560.841716612331
(2021-Dec-12.34171661)		 6.5121e-05 TDB
period 1213.900917123473
3.32		 4.7327e-06
1.296e-08		 d
yr
n .2965645671090487 1.1562e-09 deg/d
Q 2.516796926188521 6.5416e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2619  
   data-arc span      32546 days (89.11 yr)  
   first obs. used      1931-10-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45143  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:02:50  

Additional Information
 Earth MOID = .958095 au 
 Jupiter MOID = 2.67052 au 
 T_jup = 3.630 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456711.5 (2014-Feb-23.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1304397669395749 2.939e-08  
q 1.935800134918915 6.4684e-08 au
tp 2457134.481543575806
(2015-Apr-21.98154358)		 6.1051e-05 TDB
node 20.32618397115521 4.2356e-05 deg
peri 65.64203641198118 4.6044e-05 deg
i 4.345809836231935 4.3314e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2619  
   data-arc span      32546 days (89.11 yr)  
   first obs. used      1931-10-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45143  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:02:50  

Additional Information
 Jupiter MOID = 2.67052 au 
 T_jup = 3.630 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.63751581033153E-16 -1.895454753950878E-15 -8.892394669293581E-15 1.137281306796371E-15 -2.940346338165712E-14 -3.030054021919667E-17
q -1.895454753950878E-15 4.183959261637234E-15 1.197934895515688E-13 -3.22421987837177E-15 9.105296556170998E-14 5.805538476529765E-17
tp -8.892394669293581E-15 1.197934895515688E-13 3.727214043927427E-9 -1.642248820488083E-11 1.107602499364765E-9 -5.877305428425144E-13
node 1.137281306796371E-15 -3.22421987837177E-15 -1.642248820488083E-11 1.794015438567122E-9 -1.793121151853655E-9 -3.198314768855786E-11
peri -2.940346338165712E-14 9.105296556170998E-14 1.107602499364765E-9 -1.793121151853655E-9 2.120095781780117E-9 3.173202169865848E-11
i -3.030054021919667E-17 5.805538476529765E-17 -5.877305428425144E-13 -3.198314768855786E-11 3.173202169865848E-11 1.876066040165713E-11

[ 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 12.9   n/a MPO384765  
diameter diameter 7.516 km 0.192 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.2408 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]
[Carreño, A.; Fornas, G.; Arce, E.; Mas, V. (2020) Minor Planet Bull. 47, 7-10.]
geometric albedo albedo 0.180   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1814 Bach (1931 TW1)          Discovered 1931-Oct-09 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1931 TW1 = 1941 SK2 = 1961 TN1 = 1961 VF 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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