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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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09602630190530785 1.9679e-08  
a 2.780958599532142 8.7412e-09 au
q 2.513913429467306 5.3672e-08 au
i 2.48198103241204 1.0423e-06 deg
node 270.9161106356026 2.2733e-05 deg
peri 129.7215284741561 2.3653e-05 deg
M 188.549065729619 1.5685e-05 deg
tp 2460007.228811105662
(2023-Mar-03.72881111)
7.5778e-05 TDB
period 1693.909532974824
4.64
7.9865e-06
2.187e-08
d
yr
n .2125261077950086 1.002e-09 deg/d
Q 3.048003769596977 9.5806e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3278  
   data-arc span      41784 days (114.40 yr)  
   first obs. used      1906-10-08  
   last obs. used      2021-03-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4278  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 11:48:14  

Additional Information
 Earth MOID = 1.52191 au 
 Jupiter MOID = 2.30735 au 
 T_jup = 3.325 
[ 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 10.18   n/a E2021B10 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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