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 ]  
849 Ara (A915 UB)
Classification: Main-belt Asteroid          SPK-ID: 2000849
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 92 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2009181352298456 3.6333e-08  
a 3.146181407284974 1.2084e-08 au
q 2.514056505838466 1.1646e-07 au
i 19.53026733738908 4.8399e-06 deg
node 228.3651519628403 1.1465e-05 deg
peri 63.29327748073345 1.5925e-05 deg
M 323.2911470997421 1.2248e-05 deg
tp 2459208.346339381940
(2020-Dec-24.84633938)
6.993e-05 TDB
period 2038.327985371966
5.58
1.1743e-05
3.215e-08
d
yr
n .1766153448235687 1.0175e-09 deg/d
Q 3.778306308731483 1.4512e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2772  
   data-arc span      36922 days (101.09 yr)  
   first obs. used      1919-07-03  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45819  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:23:22  

Additional Information
 Earth MOID = 1.56462 au 
 Jupiter MOID = 1.575 au 
 T_jup = 3.090 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455517.5 (2010-Nov-17.0) TDB
Reference: JPL 92 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1971758870822769 3.6334e-08  
q 2.532765786700858 1.1687e-07 au
tp 2455133.231307288465
(2009-Oct-28.73130729)
6.3696e-05 TDB
node 228.3885536500246 1.1465e-05 deg
peri 64.16484549673751 1.6094e-05 deg
i 19.50486867276389 4.8348e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2772  
   data-arc span      36922 days (101.09 yr)  
   first obs. used      1919-07-03  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45819  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:23:22  

Additional Information
 Jupiter MOID = 1.575 au 
 T_jup = 3.090 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.320124328855319E-15 -4.231172956399435E-15 -5.946188701353207E-13 1.733611729516856E-16 -9.848441615850961E-14 -1.178473025127516E-15
q -4.231172956399435E-15 1.365827614978016E-14 1.9272952765798E-12 -3.873179775782623E-15 3.240301266871982E-13 4.297634277633322E-15
tp -5.946188701353207E-13 1.9272952765798E-12 4.057233358879541E-9 -1.212278659915224E-11 7.366217221368388E-10 4.254921707178077E-13
node 1.733611729516856E-16 -3.873179775782623E-15 -1.212278659915224E-11 1.314549734702264E-10 -1.254957098884721E-10 5.159181112315757E-12
peri -9.848441615850961E-14 3.240301266871982E-13 7.366217221368388E-10 -1.254957098884721E-10 2.590265747351142E-10 -4.61952732344035E-12
i -1.178473025127516E-15 4.297634277633322E-15 4.254921707178077E-13 5.159181112315757E-12 -4.61952732344035E-12 2.33751365367608E-11

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 8.2   n/a MPO473773 IRAS observations used: 4
diameter diameter 80.756 km 1.127 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.116 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J. (2006) IAU 2006, poster paper.]
[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.]
[Marciniak, A.; Michalowski, T.; Hirsch, R.; Polinska, K.; et al. (2009) Astron. Astrophys. 498, 313-320.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
[Schmidt, R.E. (2017) Minor Planet Bull. 44, 191-192.]
geometric albedo albedo 0.186   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.701   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=14.84, mean=18.35, max.=21.79) deg.
U-B UB 0.252   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=14.84, mean=18.35, max.=21.79) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

849 Ara (A915 UB)          Discovered 1912-Feb-09 by Belyavskij, S. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A915 UB = 1935 FU = 1960 WN = A912 CD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Sep-18 20:28 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin