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182 Elsa
Classification: Main-belt Asteroid          SPK-ID: 2000182
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1854130310882983 3.7288e-08  
a 2.416104258457732 6.6397e-09 au
q 1.968127044471739 9.015e-08 au
i 2.00448643084905 4.3753e-06 deg
node 107.239027685038 0.00013247 deg
peri 310.215944882427 0.00013299 deg
M 20.44439130727305 1.1859e-05 deg
tp 2457522.598895167832
(2016-May-14.09889517)
4.5107e-05 JED
period 1371.740411249309
3.76
5.6546e-06
1.548e-08
d
yr
n .2624403254782958 1.0818e-09 deg/d
Q 2.864081472443725 7.8708e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1690  
   data-arc span      40906 days (111.99 yr)  
   first obs. used      1904-01-14  
   last obs. used      2016-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61115  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:23:05  

Additional Information
 Earth MOID = .979343 au 
 Jupiter MOID = 2.48085 au 
 T_jup = 3.492 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.12 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
diameter diameter 43.68 km 4.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
rotation period rot_per 80.088 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Gandolfi, D.; Cigna, M.; Fulvio, D.; Blanco, C. (2009) Planet. Space Sci. 57, 1-9.]
[Pilcher, F.; Benishek, V.; Krajewski, R. (2009) Minor Planet Bul. 36, 40.]
[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 0.2083   0.045 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
B-V BV .862 mag .043 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=10.53, mean=17.27, max.=27.13) deg.
U-B UB .425 mag .038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=10.53, mean=16.47, max.=27.13) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 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)

182 Elsa          Discovered 1878-Feb-07 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1948 XS = 1950 HY 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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