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847 Agnia (A915 RP)
Classification: Main-belt Asteroid          SPK-ID: 2000847
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09602630236300756 1.9669e-08  
a 2.78095860636997 8.5218e-09 au
q 2.513913434375679 5.3667e-08 au
i 2.481981025155334 1.0423e-06 deg
node 270.9161107994707 2.2732e-05 deg
peri 129.7215298073002 2.364e-05 deg
M 188.5490625805868 1.5619e-05 deg
tp 2460007.228828898197
(2023-Mar-03.72882890)
7.5392e-05 TDB
period 1693.909539222307
4.64
7.786e-06
2.132e-08
d
yr
n .212526107011169 9.7687e-10 deg/d
Q 3.048003778364261 9.3401e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3285  
   data-arc span      41801 days (114.44 yr)  
   first obs. used      1906-10-08  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42897  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:56:13  

Additional Information
 Earth MOID = 1.52191 au 
 Jupiter MOID = 2.30735 au 
 T_jup = 3.325 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456353.5 (2013-Mar-02.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09311990788271386 1.9943e-08  
q 2.523141485892848 5.4201e-08 au
tp 2456620.402594913243
(2013-Nov-23.90259491)
7.001e-05 TDB
node 271.0859042963943 2.2669e-05 deg
peri 130.2502348773103 2.3667e-05 deg
i 2.484941450710851 1.0433e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3285  
   data-arc span      41801 days (114.44 yr)  
   first obs. used      1906-10-08  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42897  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:56:13  

Additional Information
 Jupiter MOID = 2.30735 au 
 T_jup = 3.325 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.97724595023343E-16 -1.070374703786168E-15 9.046892293347573E-13 -9.612950914780707E-14 2.546214626546859E-13 3.058663692309314E-15
q -1.070374703786168E-15 2.937725362060747E-15 -2.315239065120514E-12 2.720727570254862E-13 -6.723841335412123E-13 -8.70085211884742E-15
tp 9.046892293347573E-13 -2.315239065120514E-12 4.901333402268345E-9 3.165941273431514E-10 5.938723557780564E-10 2.20241871420391E-12
node -9.612950914780707E-14 2.720727570254862E-13 3.165941273431514E-10 5.138660011574822E-10 -4.516944893051043E-10 1.680633489702969E-12
peri 2.546214626546859E-13 -6.723841335412123E-13 5.938723557780564E-10 -4.516944893051043E-10 5.601343363291329E-10 -9.444290696847609E-13
i 3.058663692309314E-15 -8.70085211884742E-15 2.20241871420391E-12 1.680633489702969E-12 -9.444290696847609E-13 1.088371415675485E-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 10.19   n/a MPCxxxxx IRAS observations used: 7
diameter diameter 24.931 km 0.313 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.827 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pray, D. (2005) Minor Planet Bull. 32, 48-51.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.152   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.856   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=3.59 deg.
U-B UB 0.496   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=3.59 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B S   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)

847 Agnia (A915 RP)          Discovered 1915-Sep-02 by Neujmin, G. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A915 RP = A906 SF = A908 AG = A916 YA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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