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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1301210549242542 2.9356e-08  
a 2.22701533950815 5.7904e-09 au
q 1.937233754198854 6.4606e-08 au
i 4.344405426631166 4.3364e-06 deg
node 20.27021168989766 4.2366e-05 deg
peri 65.65196806348716 4.609e-05 deg
M 193.8225011689726 1.9025e-05 deg
tp 2459560.841717295274
(2021-Dec-12.34171730)
6.514e-05 TDB
period 1213.900917063476
3.32
4.7344e-06
1.296e-08
d
yr
n .2965645671237065 1.1566e-09 deg/d
Q 2.516796924817447 6.5439e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2608  
   data-arc span      32528 days (89.06 yr)  
   first obs. used      1931-10-09  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45151  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:15:13  

Additional Information
 Earth MOID = .958095 au 
 Jupiter MOID = 2.67052 au 
 T_jup = 3.630 
[ 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 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. 2019-August); 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]
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

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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-Jan-18 00:42 < 00:01 Juno 0.0469107194430956 0.0469036600581035 0.0469177789833815 6.37256542678535 6.37256538608862 2416863.529439732 0.281891391688128 376.841953512252 24.1305547354969 21.0126676555038 105675.825627091 T 33 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:19 2020-Nov-13 04:15
2197-Apr-12 13:02 < 00:01 Juno 0.0403281416719516 0.0403232494066415 0.0403330386012838 6.34403964183262 6.34403959428028 2523600.043357550 0.269718705121732 729.250169520323 24.9054815239537 -70.5476747674785 228332.586773898 T 33 CATAB v2.0f-lin.ifort 2020-Nov-13 04:15:19 2020-Nov-13 04:15

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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