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186 Celuta (A878 GA)
Classification: Main-belt Asteroid          SPK-ID: 2000186
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 78 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1503021718995458 6.9794e-09  
a 2.362251969802481 5.7985e-09 au
q 2.007200368167188 1.8845e-08 au
i 13.18435176152901 3.3509e-07 deg
node 14.72831981719635 1.2676e-06 deg
peri 315.4338938077992 7.6324e-06 deg
M 349.9452049224093 9.3923e-06 deg
tp 2459237.538934059709
3.4657e-05 TDB
period 1326.13505880524
n .2714655627341127 9.9954e-10 deg/d
Q 2.717303571437774 6.6701e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2698  
   data-arc span      50012 days (136.93 yr)  
   first obs. used      1883-12-07  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4375  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:00:08  

Additional Information
 Earth MOID = 1.01796 au 
 Jupiter MOID = 2.72426 au 
 T_jup = 3.500 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.06   n/a E2021B10 IRAS observations used: 8
diameter diameter 49.99 km 1.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 19.842 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Lagerkvist, C.-I.; Pettersson, B. (1978) Astron. Astrophys. Suppl. Ser. 32, 339-342.]
[Pilcher, F. (2011) Minor Planet Bull. 38, 76-78.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Behrend, R. (2017) Observatoire de Geneve web site,]
geometric albedo albedo 0.1929   0.013 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
B-V BV 0.859   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=11.20, mean=18.65, max.=22.59) deg.
U-B UB 0.397   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=22.15, mean=22.37, max.=22.59) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B K   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)

186 Celuta (A878 GA)          Discovered 1878-Apr-06 by Henry, Prosper 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

Alternate Designations
 A878 GA = 1954 FD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2021-May-07 14:46 UT
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