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40 Harmonia
Classification: Main-belt Asteroid          SPK-ID: 2000040
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 94 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04674162874247897 2.699e-08  
a 2.267159529299771 2.3453e-09 AU
q 2.161188800281268 6.1187e-08 AU
i 4.257585239965002 2.8434e-06 deg
node 94.23864330784424 4.31e-05 deg
peri 268.6705107093469 5.2091e-05 deg
M 6.660097758626701 2.9969e-05 deg
tp 2456977.432546666693
(2014-Nov-15.93254667)
0.00010379 JED
period 1246.871067205325
3.41
1.9347e-06
5.297e-09
d
yr
n .2887227151776696 4.48e-10 deg/d
Q 2.373130258318274 2.4549e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      4550  
   data-arc span      54752 days (149.90 yr)  
   first obs. used      1864-09-27  
   last obs. used      2014-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44552  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:33:22  

Additional Information
 Earth MOID = 1.16292 AU 
 T_jup = 3.610 
[ 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 7.00 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
diameter diameter 107.62 km 6.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
rotation period rot_per 8.910 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Gehrels, T.; Owings, D. (1962) Astrophys. J. 135, 906-924.]
[Lagerkvist, C.-I. (1978) Astron. Astrophys. Suppl. Ser. 31, 361-381.]
[Gallardo, T.; Tancredi, G. (1987) Rev. Mexicana Astron. Astrof. 15, 103-105.]
[Tancredi, G.; Gallardo, T. (1987) Bol. Asoc. Argent. Astron. 33, 361-368.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[Armstrong, J.C.; Nellermoe, B.L.; Reitzler, L.E. (1996) I.A.P.P.P. Comm. 63, 59-68.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (1999) Astron. Astrophys. Suppl. Ser. 139, 565-574.]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Alton, K.B. (2009) Minor Planet Bul. 36, 86.]
[Pilcher, F. (2009) Minor Planet Bul. 36, 133-136.]
[Pilcher, F. (2010) Minor Planet Bul. 37, 167.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
geometric albedo albedo 0.2418   0.031 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
B-V BV .854 mag .026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=10; phase (min.=3.66, mean=13.95, max.=26.56) deg.
U-B UB .432 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=10; phase (min.=3.66, mean=13.95, max.=26.56) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

40 Harmonia          Discovered 1856-Mar-31 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1950 XU 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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