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1214 Richilde (1932 AA)
Classification: Main-belt Asteroid          SPK-ID: 2001214
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1172958761565963 4.0461e-08  
a 2.710410458519531 9.1891e-09 au
q 2.39249048904348 1.0894e-07 au
i 9.841813148853065 4.1041e-06 deg
node 285.8421748971834 2.2128e-05 deg
peri 32.46421567655347 2.7013e-05 deg
M 68.06415160558528 1.5048e-05 deg
tp 2458692.346603924399
(2019-Jul-27.84660392)
6.7955e-05 TDB
period 1629.862709963066
4.46
8.2886e-06
2.269e-08
d
yr
n .2208774995583266 1.1233e-09 deg/d
Q 3.028330427995581 1.0267e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2900  
   data-arc span      32916 days (90.12 yr)  
   first obs. used      1930-09-20  
   last obs. used      2020-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40745  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:59:13  

Additional Information
 Earth MOID = 1.38484 au 
 Jupiter MOID = 2.23678 au 
 T_jup = 3.332 
[ 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 11.2   n/a MPO502164  
diameter diameter 36.668 km 0.575 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.860 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Barucci, M.A.; Di Martino, M.; Dotto, E.; Fulchignoni, M.; et al. (1994) Icarus 109, 267-273.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.048   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B Xk   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)

1214 Richilde (1932 AA)          Discovered 1932-Jan-01 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
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
1903-Jul-11 15:40 00:02 Eunom 0.0452455396723629 0.0452344722147723 0.0452566073347798 3.16180378490892 3.16180368678312 2416307.152738666 1.50011004599167 571.121998573672 36.7692840870938 15.3657963555252 50013.8537220605 T 36 CATAB v2.0f-lin.ifort 2020-Dec-18 01:59:20 2020-Dec-18 01:59

Alternate Designations
 1932 AA = 1930 QD = 1961 PC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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