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JPL Small-Body Database Browser
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578 Happelia (A905 VJ)
Classification: Main-belt Asteroid          SPK-ID: 2000578
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 107 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1923511459634917 2.9296e-08  
a 2.750585066060953 8.6097e-09 au
q 2.221506876534062 7.9445e-08 au
i 6.150198440995132 3.8459e-06 deg
node 29.40143604227043 2.8108e-05 deg
peri 261.1973036081691 2.979e-05 deg
M 56.71676039202827 1.0905e-05 deg
tp 2458337.990537000369
(2018-Aug-07.49053700)
4.9868e-05 TDB
period 1666.234214130992
4.56
7.8233e-06
2.142e-08
d
yr
n .2160560603946993 1.0144e-09 deg/d
Q 3.279663255587844 1.0266e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2860  
   data-arc span      41636 days (113.99 yr)  
   first obs. used      1905-11-02  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47479  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:54:47  

Additional Information
 Earth MOID = 1.21505 au 
 Jupiter MOID = 1.94654 au 
 T_jup = 3.310 
[ 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 9.4   n/a MPO265958  
diameter diameter 69.29 km 2.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 10.061 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Robinson, L. (2002) Minor Planet Bull. 29, 30-31.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2008) Minor Planet Bull. 35, 163-167.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.0769   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
SMASSII spectral type spec_B Xc   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)

578 Happelia (A905 VJ)          Discovered 1905-Nov-01 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A905 VJ = 1958 HN = A899 KA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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