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283 Emma
Classification: Main-belt Asteroid          SPK-ID: 2000283
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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1484452051099836 6.2224e-08  
a 3.04710067640137 1.3216e-08 AU
q 2.594773191502199 1.8893e-07 AU
i 7.993522491374312 6.7384e-06 deg
node 304.3715450837876 4.4538e-05 deg
peri 53.6170462576511 4.9085e-05 deg
M 338.8621386755893 2.5071e-05 deg
tp 2456914.574132779484
(2014-Sep-14.07413278)
0.00013567 JED
period 1942.80240419541
5.32
1.2639e-05
3.46e-08
d
yr
n .1852993383282794 1.2055e-09 deg/d
Q 3.499428161300541 1.5177e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1380  
   data-arc span      43310 days (118.58 yr)  
   first obs. used      1894-01-11  
   last obs. used      2012-08-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58141  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 13:22:16  

Additional Information
 Earth MOID = 1.59864 AU 
 T_jup = 3.206 
[ 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 8.72 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
diameter diameter 148.06 km 4.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
rotation period rot_per 6.896 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Stanzel, R. (1978) Astron. Astrophys. Suppl. Ser. 34, 373-376.]
[Michalowski, T.; Kaasalainen, M.; Polinska, M.; Marciniak, A.; et al. (2006) Astron. Astrophys. 459, 663-668.]
[Strabla, L.; Quadri, U.; Girelli, R. (2011) Minor Planet Bul. 38, 169-172.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J. (2011) Database of Asteroid Models from Inversion Techniques (DAMIT). http://astro.troja.mff.cuni.cz/projects/aster oids3D/web.php]
geometric albedo albedo 0.0262   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
B-V BV .712 mag .031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=18.01 deg.
U-B UB .297 mag .034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=18.01 deg.
Tholen spectral type spec_T X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

283 Emma          Discovered 1889-Feb-08 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1980 FJ12 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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