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695 Bella (A909 VD)
Classification: Main-belt Asteroid          SPK-ID: 2000695
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1602305818762123 2.7476e-08  
a 2.538937523107943 6.5173e-09 au
q 2.132122086433008 6.9373e-08 au
i 13.84774494666474 1.0275e-06 deg
node 275.5252380868359 1.8141e-06 deg
peri 80.03285094861555 4.1648e-06 deg
M 260.7233993507558 5.9031e-06 deg
tp 2459803.993649764893
(2022-Aug-12.49364976)
2.5173e-05 TDB
period 1477.666569523888
4.05
5.6896e-06
1.558e-08
d
yr
n .2436273564177567 9.3806e-10 deg/d
Q 2.945752959782878 7.5615e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3087  
   data-arc span      39370 days (107.79 yr)  
   first obs. used      1913-10-25  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35443  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:54:54  

Additional Information
 Earth MOID = 1.17661 au 
 Jupiter MOID = 2.57426 au 
 T_jup = 3.388 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456622.5 (2013-Nov-26.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159784051658928 2.749e-08  
q 2.134141841939365 6.9431e-08 au
tp 2456843.880345932899
(2014-Jul-05.38034593)
2.0236e-05 TDB
node 275.7168745088714 1.8253e-06 deg
peri 79.16290599462835 4.1763e-06 deg
i 13.85222602973245 1.0274e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3087  
   data-arc span      39370 days (107.79 yr)  
   first obs. used      1913-10-25  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35443  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:54:54  

Additional Information
 Jupiter MOID = 2.57426 au 
 T_jup = 3.388 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.556958039776202E-16 -1.902727000007592E-15 3.814167301972164E-13 2.159399688493711E-14 1.181383887788178E-14 3.530373470650528E-15
q -1.902727000007592E-15 4.820639915382802E-15 -9.447976918992731E-13 -5.480656430239377E-14 -2.423479184528556E-14 -8.995378754532123E-15
tp 3.814167301972164E-13 -9.447976918992731E-13 4.094788765681479E-10 4.705672804318668E-12 6.337969961568612E-11 3.275642369449288E-13
node 2.159399688493711E-14 -5.480656430239377E-14 4.705672804318668E-12 3.331679897297832E-12 -3.283801384984734E-12 -7.478647269180398E-13
peri 1.181383887788178E-14 -2.423479184528556E-14 6.337969961568612E-11 -3.283801384984734E-12 1.744167136598632E-11 6.762736900503456E-13
i 3.530373470650528E-15 -8.995378754532123E-15 3.275642369449288E-13 -7.478647269180398E-13 6.762736900503456E-13 1.055472516042291E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.1   n/a MPO502159 IRAS observations used: 12
diameter diameter 40.620 km 0.671 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.222 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Durech, J. (2006) IAU 2006, poster paper.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; et al. (2014) Astron. J. 147, A56.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.207   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.871   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=10.60 deg.
U-B UB 0.408   0.042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=10.60 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices; used ground-based radiometric albedo

695 Bella (A909 VD)          Discovered 1909-Nov-07 by Metcalf, J. H. at Taunton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A909 VD = 1965 QF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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