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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08515755159680691 3.1371e-08  
a 2.783981966539255 9.1914e-09 au
q 2.546904878579109 8.656e-08 au
i 3.35458905278617 3.4756e-06 deg
node 259.27995561503 4.696e-05 deg
peri 10.71352207379679 5.0286e-05 deg
M 65.90000881361809 1.946e-05 deg
tp 2458289.914607951235
(2018-Jun-20.41460795)
9.0808e-05 TDB
period 1696.672627977704
4.65
8.4024e-06
2.3e-08
d
yr
n .2121800010583602 1.0508e-09 deg/d
Q 3.021059054499402 9.9741e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3103  
   data-arc span      42411 days (116.11 yr)  
   first obs. used      1903-10-24  
   last obs. used      2019-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44553  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:42:13  

Additional Information
 Earth MOID = 1.53041 au 
 Jupiter MOID = 2.04786 au 
 T_jup = 3.324 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455277.5 (2010-Mar-22.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08563717530617961 3.1295e-08  
q 2.54802782880037 8.6679e-08 au
tp 2454906.777518797645
(2009-Mar-16.27751880)
8.2341e-05 TDB
node 259.4796393736317 4.7099e-05 deg
peri 12.97434530374469 5.0405e-05 deg
i 3.347537326576003 3.4711e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3103  
   data-arc span      42411 days (116.11 yr)  
   first obs. used      1903-10-24  
   last obs. used      2019-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44553  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:42:13  

Additional Information
 Jupiter MOID = 2.04786 au 
 T_jup = 3.324 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.793506581982665E-16 -2.700367277140033E-15 3.01624638147359E-14 -7.454987172976844E-16 9.39212310277292E-15 3.360984111095114E-16
q -2.700367277140033E-15 7.51316700804892E-15 1.775029312512286E-13 1.154863112561951E-15 3.122237783773803E-14 -9.668910727161144E-16
tp 3.01624638147359E-14 1.775029312512286E-13 6.779988466141994E-9 -8.235441612050725E-12 1.485919849858075E-9 1.868610456374672E-13
node -7.454987172976844E-16 1.154863112561951E-15 -8.235441612050725E-12 2.218283636312091E-9 -2.216015290188328E-9 7.738038367705265E-12
peri 9.39212310277292E-15 3.122237783773803E-14 1.485919849858075E-9 -2.216015290188328E-9 2.540642935070751E-9 -7.667867474223321E-12
i 3.360984111095114E-16 -9.668910727161144E-16 1.868610456374672E-13 7.738038367705265E-12 -7.667867474223321E-12 1.204886282542441E-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-January); 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 49 CATAB v2.0f-lin.ifort 2019-Dec-13 20:42:29 2019-Dec-13 20:42

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 ]
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