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
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 | Close-Approach Data ]

[ 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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08498219688577267 3.0987e-08  
a 2.784935620542353 8.9855e-09 au
q 2.548265673323221 8.5364e-08 au
i 3.354491464014985 3.4423e-06 deg
node 259.2812802229046 4.5778e-05 deg
peri 10.93396776222665 4.9146e-05 deg
M 150.5316187803861 1.9703e-05 deg
tp 2458290.682997261210
(2018-Jun-21.18299726)
9.0786e-05 TDB
period 1697.544496341121
4.65
8.2156e-06
2.249e-08
d
yr
n .2120710242211277 1.0264e-09 deg/d
Q 3.021605567761485 9.7491e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3403  
   data-arc span      42742 days (117.02 yr)  
   first obs. used      1903-10-24  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43369  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:30:04  

Additional Information
 Earth MOID = 1.53221 au 
 Jupiter MOID = 2.04793 au 
 T_jup = 3.324 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455535.5 (2010-Dec-05.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08607791784606664 3.0835e-08  
q 2.544401914224918 8.5038e-08 au
tp 2454904.682346556331
(2009-Mar-14.18234656)
8.1545e-05 TDB
node 259.413209246586 4.5888e-05 deg
peri 12.4358905802144 4.9207e-05 deg
i 3.349925136760416 3.4395e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3403  
   data-arc span      42742 days (117.02 yr)  
   first obs. used      1903-10-24  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43369  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:30:04  

Additional Information
 Jupiter MOID = 2.04793 au 
 T_jup = 3.324 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.507822829537079E-16 -2.610479636626336E-15 4.948808478677924E-14 -3.280512865625369E-16 1.271647922966075E-14 2.465560892743604E-16
q -2.610479636626336E-15 7.231435142340219E-15 1.455677837775176E-13 7.449423692271083E-16 2.712675621407217E-14 -4.845793018293907E-16
tp 4.948808478677924E-14 1.455677837775176E-13 6.649537353096118E-9 -6.042765043227696E-12 1.456053065561443E-9 3.848548650274134E-13
node -3.280512865625369E-16 7.449423692271083E-16 -6.042765043227696E-12 2.105669791058405E-9 -2.10301551233462E-9 5.811899519591837E-12
peri 1.271647922966075E-14 2.712675621407217E-14 1.456053065561443E-9 -2.10301551233462E-9 2.42129375335869E-9 -5.684933797844106E-12
i 2.465560892743604E-16 -4.845793018293907E-16 3.848548650274134E-13 5.811899519591837E-12 -5.684933797844106E-12 1.183042052902754E-11

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 10.4   n/a MPO502156 IRAS observations used: 3
diameter diameter 44.189 km 0.455 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 19.71 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[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.]
geometric albedo albedo 0.033   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2134-Nov-17 15:25 00:03 Iris 0.0426862261614694 0.0426853167515242 0.0426871374045096 4.62568319632673 4.62568316721223 2500808.142427867 2.69006473454943 525.087028540831 24.4184040953183 -85.8214831214177 260711.976869539 T 54 CATAB v2.0f-lin.ifort 2020-Nov-13 04:30:15 2020-Nov-13 04:30

Alternate Designations
 A894 WC = 1926 SA = 1972 JF = A916 OG = A924 EM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-29 07:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin