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
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
159 Aemilia
Classification: Main-belt Asteroid          SPK-ID: 2000159
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 95 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1070181227689404 3.4616e-08  
a 3.102688587251141 1.2718e-08 au
q 2.770644679106908 1.1036e-07 au
i 6.130813712009724 3.4002e-06 deg
node 134.1144264458537 3.5131e-05 deg
peri 333.2562649123209 3.8799e-05 deg
M 34.40173194727738 1.6558e-05 deg
tp 2458409.741668128693
(2018-Oct-18.24166813)
9.1791e-05 TDB
period 1996.207620561544
5.47
1.2273e-05
3.36e-08
d
yr
n .1803419625753808 1.1088e-09 deg/d
Q 3.434732495395374 1.4079e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2850  
   data-arc span      42125 days (115.33 yr)  
   first obs. used      1904-01-11  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44686  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:03:41  

Additional Information
 Earth MOID = 1.78927 au 
 Jupiter MOID = 1.67588 au 
 T_jup = 3.204 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.3   n/a MPO473762 IRAS observations used: 17
diameter diameter 125.236 km 1.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 24.476 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2013) Minor Planet Bull. 40, 85-87.]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Marciniak, A.; Bartczak, P.; Muller, T.; Sanabria, J.J.; et al. (2018) Astron. Astrophys. 610, A7.]
geometric albedo albedo 0.064   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.700   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.71, mean=8.02, max.=9.80) deg.
U-B UB 0.380   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.71, mean=8.02, max.=9.80) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Ch   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)

159 Aemilia          Discovered 1876-Jan-26 by Henry, Paul at Paris
In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1959 EG1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-27 00:15 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin