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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1125865169758766 3.2862e-08  
a 2.229255804511273 5.2729e-09 au
q 1.978271658033093 7.4476e-08 au
i 4.397001685024593 3.3278e-06 deg
node 327.0724060460404 4.2014e-05 deg
peri 244.8023840390994 4.454e-05 deg
M 329.1391492128646 1.5459e-05 deg
tp 2459104.718226884220
(2020-Sep-12.21822688)
5.2237e-05 TDB
period 1215.73322579814
3.33
4.3134e-06
1.181e-08
d
yr
n .2961175958349387 1.0506e-09 deg/d
Q 2.480239950989453 5.8666e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3119  
   data-arc span      37175 days (101.78 yr)  
   first obs. used      1918-09-02  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39582  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:29:01  

Additional Information
 Earth MOID = .97747 au 
 Jupiter MOID = 2.49975 au 
 T_jup = 3.631 
[ 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 11.8   n/a MPO502165  
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 5.615 h n/a LCDB (Rev. 2019-August); 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.]
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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