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1842 Hynek (1972 AA)
Classification: Main-belt Asteroid          SPK-ID: 2001842
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1808268217221563 3.0546e-08  
a 2.266143669364038 5.934e-09 au
q 1.856364112067154 7.0164e-08 au
i 5.354536284516661 3.6409e-06 deg
node 153.4289945361691 3.5454e-05 deg
peri 125.7328348088384 3.7075e-05 deg
M 268.2202618932063 1.2947e-05 deg
tp 2459318.168315442939
(2021-Apr-13.66831544)
4.5388e-05 TDB
period 1246.033121454209
3.41
4.8942e-06
1.34e-08
d
yr
n .2889168785335774 1.1348e-09 deg/d
Q 2.675923226660922 7.007e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3011  
   data-arc span      33134 days (90.72 yr)  
   first obs. used      1929-09-29  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40578  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:37:26  

Additional Information
 Earth MOID = .846163 au 
 Jupiter MOID = 2.46912 au 
 T_jup = 3.589 
[ 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 12.6   n/a MPO502171  
diameter diameter 7.996 km 0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.9410 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.300   0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.871   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.82 deg.
U-B UB 0.522   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=4.82 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

1842 Hynek (1972 AA)          Discovered 1972-Jan-14 by Kohoutek, L. at Bergedorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1972 AA = 1928 DE = 1929 SO = 1952 DN2 = 1953 UV = 1962 EA = 1963 SS = 1964 YF = 1966 HE = 1969 EG1 = 2004 TE363 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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