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4170 Semmelweis (1980 PT)
Classification: Main-belt Asteroid          SPK-ID: 2004170
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08448899854438341 2.9187e-08  
a 3.022616029101203 1.4075e-08 au
q 2.767238227818241 8.967e-08 au
i 10.3661061093527 3.3418e-06 deg
node 171.6605674393028 1.7334e-05 deg
peri 119.5860819038471 2.6329e-05 deg
M 266.5680873001301 2.0983e-05 deg
tp 2459698.656311869561
(2022-Apr-29.15631187)
0.00011282 TDB
period 1919.432740814391
5.26
1.3407e-05
3.671e-08
d
yr
n .1875554127764105 1.3101e-09 deg/d
Q 3.277993830384164 1.5264e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2984  
   data-arc span      30642 days (83.89 yr)  
   first obs. used      1937-05-01  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41767  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:27:17  

Additional Information
 Earth MOID = 1.76787 au 
 Jupiter MOID = 1.94462 au 
 T_jup = 3.216 
[ 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 11.73   n/a MPCxxxxx  
diameter diameter 16.820 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.31 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Aznar, A.M. (2016) Minor Planet Bull. 43, 350-353]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.172   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4170 Semmelweis (1980 PT)          Discovered 1980-Aug-06 by Vavrova, Z. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1980 PT = 1937 JC = 1978 EJ4 = 1986 TQ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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