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942 Romilda (A920 TG)
Classification: Main-belt Asteroid          SPK-ID: 2000942
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1685019626330201 3.76e-08  
a 3.165450770473131 1.4928e-08 au
q 2.632066103030203 1.2054e-07 au
i 10.56003753395525 3.9934e-06 deg
node 71.34206664221985 2.0625e-05 deg
peri 319.3629949713488 2.3729e-05 deg
M 258.1440608090286 1.4968e-05 deg
tp 2459582.516945424840
(2022-Jan-03.01694542)
8.8345e-05 TDB
period 2057.08279769625
5.63
1.4552e-05
3.984e-08
d
yr
n .1750051093729275 1.238e-09 deg/d
Q 3.698835437916059 1.7444e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2509  
   data-arc span      36555 days (100.08 yr)  
   first obs. used      1920-10-11  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42387  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:57:19  

Additional Information
 Earth MOID = 1.64928 au 
 Jupiter MOID = 1.76085 au 
 T_jup = 3.155 
[ 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 11.0   n/a MPO347521  
diameter diameter 36.772 km 0.196 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.965 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]
[Cooney, Jr.; W.R.; Gross, J.; Terrell, D.; Reddy, V.; Dyvig, R. (2007) Minor Planet Bull. 34, 47-48.]
geometric albedo albedo 0.056   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

942 Romilda (A920 TG)          Discovered 1920-Oct-11 by Reinmuth, K. at Heidelberg
Independent discovery later the same night by A. Schwassmann, Bergedorf.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A920 TG = 2019 GE35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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