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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 109 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1923251233155803 2.8622e-08  
a 2.751530011942546 8.4854e-09 au
q 2.222341663089176 7.7295e-08 au
i 6.148784600573065 3.8245e-06 deg
node 29.39540834086968 2.7465e-05 deg
peri 261.3117493768702 2.9162e-05 deg
M 142.994083968922 1.1105e-05 deg
tp 2458338.321040111743
(2018-Aug-07.82104011)
4.9871e-05 TDB
period 1667.092924009236
4.56
7.7117e-06
2.111e-08
d
yr
n .2159447711734187 9.9892e-10 deg/d
Q 3.280718360795916 1.0117e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2940  
   data-arc span      41670 days (114.09 yr)  
   first obs. used      1905-11-02  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46961  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:45:14  

Additional Information
 Earth MOID = 1.21653 au 
 Jupiter MOID = 1.94745 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-August); 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

[ show close-approach data ]
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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