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56 Melete
Classification: Main-belt Asteroid          SPK-ID: 2000056
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 81 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2365444120097486 3.6703e-08  
a 2.600138980203962 4.6392e-09 AU
q 1.985090633987988 9.5277e-08 AU
i 8.063255628554947 6.2436e-06 deg
node 193.1505076680652 3.2028e-05 deg
peri 104.4737453173909 3.4891e-05 deg
M 183.12120846853 1.5118e-05 deg
tp 2457552.930742816870
(2016-Jun-13.43074282)
6.4921e-05 JED
period 1531.416316612948
4.19
4.0986e-06
1.122e-08
d
yr
n .2350765079976531 6.2915e-10 deg/d
Q 3.215187326419935 5.7366e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1545  
   data-arc span      54339 days (148.77 yr)  
   first obs. used      1865-06-13  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61272  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:34:02  

Additional Information
 Earth MOID = .987578 AU 
 T_jup = 3.361 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.31 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 26
diameter diameter 113.24 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 26
rotation period rot_per 18.147 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Bel'skaya, I.N.; Dovgopol, A.N.; Erikson, A.; Lagerkvist, C.-I.; Oja, T. (1993) Astron. Astrophys. Suppl. Ser. 101, 507-511.]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2007) Minor Planet Bul. 34, 104-107.]
[Pilcher, F.; Jardine, D. (2009) Minor Planet Bul. 36, 52-54.]
[Warner, B.D. (2011) http://www.minorplanetobserver.com/PDO/PDOLig htcurves.htm]
geometric albedo albedo 0.0653   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 26
B-V BV .697 mag .033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=4.79, mean=12.85, max.=28.04) deg.
U-B UB .312 mag .039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=4.79, mean=12.85, max.=28.04) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Xk   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)

56 Melete          Discovered 1857-Sep-09 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1949 TH = 1986 EN5 = 1990 HG4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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