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1820 Lohmann (1949 PO)
Classification: Main-belt Asteroid          SPK-ID: 2001820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2103199239030938 3.3198e-08  
a 2.197919592437963 5.52e-09 au
q 1.735653311011292 7.4193e-08 au
i 5.00024110775853 3.7528e-06 deg
node 145.1650757923568 3.7357e-05 deg
peri 169.0987855321218 3.8456e-05 deg
M 266.6557845469586 1.1503e-05 deg
tp 2459309.103634481259
(2021-Apr-04.60363448)
3.8745e-05 TDB
period 1190.189535302728
3.26
4.4837e-06
1.228e-08
d
yr
n .3024728325379142 1.1395e-09 deg/d
Q 2.660185873864635 6.681e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2558  
   data-arc span      35404 days (96.93 yr)  
   first obs. used      1923-09-13  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43031  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:15:09  

Additional Information
 Earth MOID = .722196 au 
 Jupiter MOID = 2.62975 au 
 T_jup = 3.633 
[ 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 13.2   n/a MPO421646  
diameter diameter 5.349 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.0554 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm]
[Martinez, L. (2012) Minor Planet Bull. 39, 25-26.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.390   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1820 Lohmann (1949 PO)          Discovered 1949-Aug-02 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1949 PO = 1949 QV = 1952 MG = 1962 PK = 1968 HS = 1974 CJ1 = A923 RF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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