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 ]  
283 Emma
Classification: Main-belt Asteroid          SPK-ID: 2000283
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 79 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1441107250443559 4.0527e-08  
a 3.048200199923004 1.1175e-08 au
q 2.60892185903175 1.2417e-07 au
i 7.989495627078288 4.4104e-06 deg
node 303.90117202 3.0246e-05 deg
peri 55.25230490667767 3.3246e-05 deg
M 24.85094894604095 1.4428e-05 deg
tp 2458866.314949461269
(2020-Jan-17.81494946)		 7.7754e-05 TDB
period 1943.854067658811
5.32		 1.0689e-05
2.926e-08		 d
yr
n .1851990877245153 1.0184e-09 deg/d
Q 3.487478540814259 1.2785e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2987  
   data-arc span      46035 days (126.04 yr)  
   first obs. used      1894-01-11  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44855  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:23:10  

Additional Information
 Earth MOID = 1.61484 au 
 Jupiter MOID = 1.99994 au 
 T_jup = 3.207 
[ 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 8.6   n/a MPO502155 IRAS observations used: 4
diameter diameter 132.385 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.896 h n/a LCDB (Rev. 2019-August); 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.]
[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/asteroids3D/web.php]
[Strabla, L.; Quadri, U.; Girelli, R. (2011) Minor Planet Bull. 38, 169-172.]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Alton, K.B. (2015) Minor Planet Bull. 42, 146-148.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.]
geometric albedo albedo 0.023   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.712   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=18.01 deg.
U-B UB 0.297   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1979-May-10 06:29 < 00:01 Jupiter 1.99721898476747 1.99721859962497 1.99721936990997 3.56784237497837 3.44692577025016 2444003.770283329 0.53145176094992 86.8846154191198 15.1167117876036 -85.8155170857833 3480055.81998226 T 79 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:25 2020-Feb-22 15:23
2027-Jul-29 03:01 < 00:01 Jupiter 1.99141691624828 1.99141650237612 1.99141733012032 3.07713440153792 2.93565715123409 2461615.625978727 0.341678490605192 129.137902775064 16.2118564470709 -87.239751059663 3305600.74523625 T 79 CATAB v2.0f-lin.ifort 2020-Feb-22 15:23:25 2020-Feb-22 15:23

Alternate Designations
 1980 FJ12 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-08 19:45 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin