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1726 Hoffmeister (1933 OE)
Classification: Main-belt Asteroid          SPK-ID: 2001726
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04280292293556376 3.1537e-08  
a 2.786790719075165 9.8644e-09 au
q 2.667507930689046 9.0027e-08 au
i 3.483659277577415 3.4981e-06 deg
node 230.9559764305194 6.2009e-05 deg
peri 69.56884530555928 7.7291e-05 deg
M 253.2507541974712 4.7201e-05 deg
tp 2459504.368576608951
(2021-Oct-16.86857661)
0.00022327 TDB
period 1699.240928734743
4.65
9.0222e-06
2.47e-08
d
yr
n .2118593037116029 1.1249e-09 deg/d
Q 2.906073507461284 1.0287e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3076  
   data-arc span      34995 days (95.81 yr)  
   first obs. used      1924-10-22  
   last obs. used      2020-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:16:05  

Additional Information
 Earth MOID = 1.65439 au 
 Jupiter MOID = 2.1794 au 
 T_jup = 3.327 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456639.5 (2013-Dec-13.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04261840464204115 3.1175e-08  
q 2.668213973881807 8.9003e-08 au
tp 2456084.644159067825
(2012-Jun-06.14415907)
0.00022245 TDB
node 231.2104536490817 6.1976e-05 deg
peri 65.28532354853009 7.7561e-05 deg
i 3.484520475226868 3.4964e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3076  
   data-arc span      34995 days (95.81 yr)  
   first obs. used      1924-10-22  
   last obs. used      2020-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:16:05  

Additional Information
 Jupiter MOID = 2.1794 au 
 T_jup = 3.327 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.719079240445315E-16 -2.75956517160545E-15 1.170743445701E-12 -1.140351906962611E-15 2.552899137746613E-13 1.952346261239315E-16
q -2.75956517160545E-15 7.921581952917159E-15 -2.974020175780667E-12 2.556901318713527E-15 -6.468364535202784E-13 -4.588108508957842E-16
tp 1.170743445701E-12 -2.974020175780667E-12 4.948365338740465E-8 -2.562265995876084E-13 1.039306118163723E-8 2.067832119486229E-12
node -1.140351906962611E-15 2.556901318713527E-15 -2.562265995876084E-13 3.841058837934788E-9 -3.833618783341299E-9 -5.12349174846637E-11
peri 2.552899137746613E-13 -6.468364535202784E-13 1.039306118163723E-8 -3.833618783341299E-9 6.015744359113436E-9 5.157147470568663E-11
i 1.952346261239315E-16 -4.588108508957842E-16 2.067832119486229E-12 -5.12349174846637E-11 5.157147470568663E-11 1.222514326165828E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.3   n/a MPO365265  
diameter diameter 25.250 km 0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.706 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.037   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B Cb   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1726 Hoffmeister (1933 OE)          Discovered 1933-Jul-24 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1933 OE = 1955 FC = 1955 HX = 1957 WD = A924 UA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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