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
JPL Small-Body Database Browser
Search: [ help ]  
283 Emma (A889 CA)
Classification: Main-belt Asteroid          SPK-ID: 2000283
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1442624017963222 2.2255e-08  
a 3.049044758036438 1.023e-08 au
q 2.609182238057616 6.5717e-08 au
i 7.989483252462029 6.2428e-07 deg
node 303.901250093433 4.9336e-06 deg
peri 55.33061651130614 8.4149e-06 deg
M 61.80539559611584 5.8767e-06 deg
tp 2458866.637211785808
(2020-Jan-18.13721179)
3.1405e-05 TDB
period 1944.661992660435
5.32
9.7867e-06
2.679e-08
d
yr
n .1851221453181664 9.3165e-10 deg/d
Q 3.488907278015261 1.1706e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3411  
   data-arc span      46448 days (127.17 yr)  
   first obs. used      1894-01-11  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43109  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:38:14  

Additional Information
 Earth MOID = 1.61348 au 
 Jupiter MOID = 1.99949 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 8.66   n/a E2021B10 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. 2020-October); 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 (A889 CA)          Discovered 1889-Feb-08 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A889 CA = 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 2021-Apr-15 03:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin