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JPL Small-Body Database Browser
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182 Elsa
Classification: Main-belt Asteroid          SPK-ID: 2000182
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 102 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1864822069427291 3.469e-08  
a 2.416075101935197 5.9364e-09 au
q 1.965520084786942 8.3932e-08 au
i 2.005421229179652 4.0708e-06 deg
node 107.1839319621095 0.00012653 deg
peri 310.8437263082529 0.00012712 deg
M 27.09470989615883 1.2803e-05 deg
tp 2458897.260456316917
(2020-Feb-17.76045632)
4.8688e-05 TDB
period 1371.715580951064
3.76
5.0555e-06
1.384e-08
d
yr
n .2624450760779417 9.6726e-10 deg/d
Q 2.866630119083452 7.0434e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2626  
   data-arc span      42362 days (115.98 yr)  
   first obs. used      1904-01-14  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51917  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:17:28  

Additional Information
 Earth MOID = .978468 au 
 Jupiter MOID = 2.47211 au 
 T_jup = 3.492 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.1   n/a MPO492750 IRAS observations used: 14
diameter diameter 39.520 km 0.387 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 80.088 h n/a LCDB (Rev. 2019-August); 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 Bull. 36, 40.]
[Durech, J. (2011) Database of Asteroid Models from Inversion Techniques (DAMIT). http://astro.troja.mff.cuni.cz/projects/asteroids3D/web.php]
geometric albedo albedo 0.196   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.862   0.043 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=10.53, mean=17.27, max.=27.13) deg.
U-B UB 0.425   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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