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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 119 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1922305822411185 1.7622e-08  
a 2.751848946766638 7.6581e-09 au
q 2.222859421490079 4.4991e-08 au
i 6.148375544366061 5.2287e-07 deg
node 29.38505427995275 3.7777e-06 deg
peri 261.3660768602193 6.5151e-06 deg
M 186.1187057197521 6.6699e-06 deg
tp 2460005.851880272990
(2023-Mar-02.35188027)
3.3672e-05 TDB
period 1667.382786045955
4.57
6.9602e-06
1.906e-08
d
yr
n .2159072307887422 9.0127e-10 deg/d
Q 3.280838472043198 9.1302e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3623  
   data-arc span      42142 days (115.38 yr)  
   first obs. used      1905-11-02  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43045  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:36:34  

Additional Information
 Earth MOID = 1.21513 au 
 Jupiter MOID = 1.94682 au 
 T_jup = 3.310 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455983.5 (2012-Feb-26.0) TDB
Reference: JPL 119 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1940875833714729 1.7613e-08  
q 2.215343868944674 4.5028e-08 au
tp 2456674.316725983942
(2014-Jan-16.81672598)
2.3123e-05 TDB
node 29.41889645132392 3.7761e-06 deg
peri 261.7537244752272 6.4974e-06 deg
i 6.153189865331222 5.234e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3623  
   data-arc span      42142 days (115.38 yr)  
   first obs. used      1905-11-02  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43045  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:36:34  

Additional Information
 Jupiter MOID = 1.94682 au 
 T_jup = 3.310 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.102021769021371E-16 -7.884736001001196E-16 2.705335845836756E-13 4.853195029444562E-15 2.987440494093201E-14 -2.43603138059758E-15
q -7.884736001001196E-16 2.02752815017984E-15 -6.577627691951918E-13 -1.64652593000077E-14 -6.540071747919336E-14 6.210195266602289E-15
tp 2.705335845836756E-13 -6.577627691951918E-13 5.346828099512415E-10 -3.673581808208628E-11 1.237866592608561E-10 -1.739786752122263E-12
node 4.853195029444562E-15 -1.64652593000077E-14 -3.673581808208628E-11 1.425926577438541E-11 -2.063900048680069E-11 -1.271013927245478E-12
peri 2.987440494093201E-14 -6.540071747919336E-14 1.237866592608561E-10 -2.063900048680069E-11 4.221569456475177E-11 1.06932480996281E-12
i -2.43603138059758E-15 6.210195266602289E-15 -1.739786752122263E-12 -1.271013927245478E-12 1.06932480996281E-12 2.739503682669447E-13

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 9.48   n/a MPCxxxxx  
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. 2020-October); 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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