Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
JPL Small-Body Database Browser
Search: [ help ]  
182 Elsa (A878 CC)
Classification: Main-belt Asteroid          SPK-ID: 2000182
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.

[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 104 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1864822210816312 3.4178e-08  
a 2.416075102870779 5.7275e-09 au
q 1.965520051387405 8.2814e-08 au
i 2.00542121963291 3.9526e-06 deg
node 107.1839061525069 0.00012492 deg
peri 310.843752703253 0.00012548 deg
M 27.09470823230886 1.2174e-05 deg
tp 2458897.260462596753
4.6317e-05 TDB
period 1371.715581747823
n .2624450759255009 9.3321e-10 deg/d
Q 2.866630154354152 6.7955e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2806  
   data-arc span      42658 days (116.79 yr)  
   first obs. used      1904-01-14  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50676  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:30  

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] (  
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).]
geometric albedo albedo 0.196   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
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 (A878 CC)          Discovered 1878-Feb-07 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A878 CC = 1948 XS = 1950 HY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Nov-28 16:22 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin