Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1477338877980004 4.1109e-08  
a 3.046879870288603 1.2825e-08 au
q 2.5967524613974 1.2327e-07 au
i 7.991621694245739 4.7283e-06 deg
node 304.3691812762893 3.2967e-05 deg
peri 53.70204395525081 3.5866e-05 deg
M 127.106678900187 1.5442e-05 deg
tp 2456914.621333371428
(2014-Sep-14.12133337)
8.2142e-05 JED
period 1942.591232205679
5.32
1.2265e-05
3.358e-08
d
yr
n .1853194815417986 1.1701e-09 deg/d
Q 3.497007279179805 1.4719e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1929  
   data-arc span      44655 days (122.26 yr)  
   first obs. used      1894-01-11  
   last obs. used      2016-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54162  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:26:42  

Additional Information
 Earth MOID = 1.601 au 
 Jupiter MOID = 1.97626 au 
 T_jup = 3.207 
[ 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 LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Stanzel, R. (1978) Astron. Astrophys. Suppl. Ser. 34, 373-376.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[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]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Alton, K.B. (2015) Minor Planet Bul. 42, 146-148.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Apr-30 05:16 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin