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JPL Small-Body Database Browser
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186 Celuta
Classification: Main-belt Asteroid          SPK-ID: 2000186
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1503214121613969 4.6422e-08  
a 2.361842696446514 7.1724e-09 au
q 2.006807167013593 1.097e-07 au
i 13.18435054904103 5.6111e-06 deg
node 14.75299521164919 1.7806e-05 deg
peri 315.5296349595799 2.4479e-05 deg
M 295.5501517909694 1.8911e-05 deg
tp 2459237.852756058577
7.0017e-05 TDB
period 1325.790433267693
n .2715361274049198 1.2369e-09 deg/d
Q 2.716878225879436 8.2506e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2378  
   data-arc span      49704 days (136.08 yr)  
   first obs. used      1883-12-07  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46047  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:17:28  

Additional Information
 Earth MOID = 1.0193 au 
 Jupiter MOID = 2.72459 au 
 T_jup = 3.500 
[ 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 9.1   n/a MPO492750 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. 2019-August); 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          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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
1908-Aug-20 12:05 < 00:01 Hebe 0.0382421659674537 0.0382379877438615 0.0382463450491941 10.0409261836574 10.0409261674676 2418174.003687724 0.316811219491557 355.383269158765 26.0862826918985 -54.3218440297862 178371.620230408 T 70 CATAB v2.0f-lin.ifort 2020-Jan-28 17:18:12 2020-Jan-28 17:18

Alternate Designations
 1954 FD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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