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
JPL Small-Body Database Browser
Search: [ help ]  
395 Delia (A894 WC)
Classification: Main-belt Asteroid          SPK-ID: 2000395
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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 63 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08467857546506409 1.7743e-08  
a 2.785625624695485 7.9985e-09 au
q 2.549742815017292 4.5734e-08 au
i 3.353584201665188 3.667e-07 deg
node 259.2743691177569 4.0698e-06 deg
peri 11.06678700050619 9.8261e-06 deg
M 234.3403429895525 1.2864e-05 deg
tp 2459989.255946245703
6.2723e-05 TDB
period 1698.175418628681
n .2119922335766166 9.1306e-10 deg/d
Q 3.021508434373678 8.6758e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3948  
   data-arc span      42970 days (117.65 yr)  
   first obs. used      1903-10-24  
   last obs. used      2021-06-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41269  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:00:33  

Additional Information
 Earth MOID = 1.5336 au 
 Jupiter MOID = 2.04592 au 
 T_jup = 3.324 
[ 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 10.49   n/a MPO614063 IRAS observations used: 3
diameter diameter 44.189 km 0.455 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 19.681 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site,]
[Behrend, R. (2006) Observatoire de Geneve web site,]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Ditteon, R.; Adam, A.; Doyel, M.; Gibson, J.; et al. (2018) Minor Planet Bull. 45, 13-16.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 34-36.]
[Polakis, T. (2020) Minor Planet Bull. 47, 94-101.]
geometric albedo albedo 0.033   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.726   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.49, mean=3.98, max.=11.13) deg.
U-B UB 0.356   0.078 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.71, mean=2.16, max.=2.61) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Ch   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)

395 Delia (A894 WC)          Discovered 1894-Nov-30 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A894 WC = 1926 SA = 1972 JF = A916 OG = A924 EM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2021-Aug-04 18:48 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin