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2152 Hannibal (1978 WK)
Classification: Main-belt Asteroid          SPK-ID: 2002152
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2204489171064351 4.4378e-08  
a 3.12423922123549 1.4616e-08 au
q 2.435504068132674 1.3726e-07 au
i 13.96462311568335 4.3531e-06 deg
node 250.9290253812504 1.6746e-05 deg
peri 142.006286386023 1.8338e-05 deg
M 173.3769721961354 8.797e-06 deg
tp 2458029.087336662519
(2017-Oct-02.58733666)
4.6323e-05 TDB
period 2017.041561931765
5.52
1.4154e-05
3.875e-08
d
yr
n .1784792176791936 1.2524e-09 deg/d
Q 3.812974374338306 1.7838e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2495  
   data-arc span      29547 days (80.90 yr)  
   first obs. used      1939-09-14  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41608  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:46:21  

Additional Information
 Earth MOID = 1.45956 au 
 Jupiter MOID = 1.69266 au 
 T_jup = 3.132 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456910.5 (2014-Sep-10.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2205867627488294 4.4367e-08  
q 2.435077903582695 1.3722e-07 au
tp 2456013.281157749840
(2012-Mar-26.78115775)
4.3144e-05 TDB
node 250.9418904818957 1.674e-05 deg
peri 142.413971132066 1.8331e-05 deg
i 13.96718670976122 4.3541e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2495  
   data-arc span      29547 days (80.90 yr)  
   first obs. used      1939-09-14  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41608  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:46:21  

Additional Information
 Jupiter MOID = 1.69266 au 
 T_jup = 3.132 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.968426331949117E-15 -6.06780380827304E-15 1.200381544493524E-13 -2.617191005368863E-15 -1.374763677894685E-14 6.907224062709414E-17
q -6.06780380827304E-15 1.883004980367442E-14 -3.448245323560983E-13 7.753958020495683E-15 5.812153977310068E-14 -6.423827054537832E-17
tp 1.200381544493524E-13 -3.448245323560983E-13 1.861363413444119E-9 -9.071133071395824E-13 3.411086051671553E-10 -1.887873138390043E-12
node -2.617191005368863E-15 7.753958020495683E-15 -9.071133071395824E-13 2.802367918253112E-10 -2.717003113333261E-10 -1.96428171452512E-11
peri -1.374763677894685E-14 5.812153977310068E-14 3.411086051671553E-10 -2.717003113333261E-10 3.360236730897152E-10 1.874952277877279E-11
i 6.907224062709414E-17 -6.423827054537832E-17 -1.887873138390043E-12 -1.96428171452512E-11 1.874952277877279E-11 1.895812957994202E-11

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 10.8   n/a MPO384768  
diameter diameter 44.559 km 0.556 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.978 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ditteon, R.; Hawkins, S. (2007) Minor Planet Bull. 34, 59-64.]
geometric albedo albedo 0.047   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Ch   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)

2152 Hannibal (1978 WK)          Discovered 1978-Nov-19 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1978 WK = 1939 RM = 1952 BG1 = 1977 OB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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