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623 Chimaera (A907 BC)
Classification: Main-belt Asteroid          SPK-ID: 2000623
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 74 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1117776420809135 3.4383e-08  
a 2.463104421400029 7.6564e-09 au
q 2.187784416976861 8.298e-08 au
i 14.12881286883441 4.6975e-06 deg
node 308.3116773148507 1.5863e-05 deg
peri 124.2021077879636 2.7354e-05 deg
M 234.7922976906258 2.294e-05 deg
tp 2459691.578824594421
(2022-Apr-22.07882459)
9.0842e-05 TDB
period 1411.9608745568
3.87
6.5835e-06
1.802e-08
d
yr
n .2549645719560042 1.1888e-09 deg/d
Q 2.738424425823198 8.5122e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2449  
   data-arc span      40572 days (111.08 yr)  
   first obs. used      1909-09-12  
   last obs. used      2020-10-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40268  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:27:37  

Additional Information
 Earth MOID = 1.23393 au 
 Jupiter MOID = 2.48658 au 
 T_jup = 3.439 
[ 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 10.81   n/a E2021B10 IRAS observations used: 8
diameter diameter 44.09 km 1.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 14.635 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Fleenor, M.L. (2007) Minor Planet Bull. 34, 66-67.]
geometric albedo albedo 0.0372   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
B-V BV 0.714   0.067 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=10.59, mean=10.66, max.=10.73) deg.
U-B UB 0.324   0.063 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=10.73 deg.
Tholen spectral type spec_T XC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

623 Chimaera (A907 BC)          Discovered 1907-Jan-22 by Lohnert, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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