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1274 Delportia (1932 WC)
Classification: Main-belt Asteroid          SPK-ID: 2001274
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1127881869175244 1.5646e-08  
a 2.230088576718392 4.7811e-09 au
q 1.978560929484842 3.5601e-08 au
i 4.397028133115671 7.6589e-07 deg
node 327.0715417436235 6.9618e-06 deg
peri 245.0200625357396 9.3949e-06 deg
M 86.17192050314239 9.0297e-06 deg
tp 2459105.331179029697
(2020-Sep-12.83117903)
3.0231e-05 TDB
period 1216.41452270391
3.33
3.9118e-06
1.071e-08
d
yr
n .2959517444758659 9.5173e-10 deg/d
Q 2.481616223951943 5.3203e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3387  
   data-arc span      37597 days (102.93 yr)  
   first obs. used      1918-09-02  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39054  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:30:34  

Additional Information
 Earth MOID = .978339 au 
 Jupiter MOID = 2.49645 au 
 T_jup = 3.630 
[ 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 11.94   n/a MPO636080  
diameter diameter 9.611 km 0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.56 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Sheridan, E. (2011) Posting on CALL site. http://www.minorplanet.info/call.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Benishek, V. (2020) Minor Planet Bull. 47, 231-241.]
geometric albedo albedo 0.461   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.895   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.83, mean=3.79, max.=4.75) deg.
U-B UB 0.525   0.052 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.83, mean=3.79, max.=4.75) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

1274 Delportia (1932 WC)          Discovered 1932-Nov-28 by Delporte, E. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1932 WC = 1926 AA = 1928 RX = 1934 JD = A918 RA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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