Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1125865214651188 3.4524e-08  
a 2.229255805215401 5.494e-09 au
q 1.978271648650276 7.7722e-08 au
i 4.397001672954607 3.3391e-06 deg
node 327.0723919426043 4.648e-05 deg
peri 244.8023990148711 4.8743e-05 deg
M 329.1391476002546 1.5888e-05 deg
tp 2459104.718232379440
(2020-Sep-12.21823238)
5.3707e-05 TDB
period 1215.733226374139
3.33
4.4943e-06
1.23e-08
d
yr
n .2961175956946421 1.0947e-09 deg/d
Q 2.480239961780526 6.1126e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2840  
   data-arc span      37046 days (101.43 yr)  
   first obs. used      1918-09-02  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40579  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:50:16  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-29 07:03 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin