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848 Inna (A915 RQ)
Classification: Main-belt Asteroid          SPK-ID: 2000848
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1627728516087477 3.0354e-08  
a 3.11087280558882 1.1578e-08 au
q 2.604507168031022 9.3372e-08 au
i 1.053599471739893 3.5502e-06 deg
node 207.8096502004323 0.00017122 deg
peri 125.4670921250837 0.0001715 deg
M 92.41851542782567 1.0043e-05 deg
tp 2458686.008391498414
(2019-Jul-21.50839150)
5.5736e-05 TDB
period 2004.111169749489
5.49
1.1189e-05
3.063e-08
d
yr
n .1796307537395739 1.0029e-09 deg/d
Q 3.617238443146617 1.3463e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3741  
   data-arc span      42026 days (115.06 yr)  
   first obs. used      1905-12-27  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45535  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:50:20  

Additional Information
 Earth MOID = 1.59258 au 
 Jupiter MOID = 1.75549 au 
 T_jup = 3.198 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456632.5 (2013-Dec-06.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1683287589550714 3.0694e-08  
q 2.583793419636335 9.5214e-08 au
tp 2456680.232517013956
(2014-Jan-22.73251701)
5.3691e-05 TDB
node 208.0088011846556 0.00017271 deg
peri 124.7858377636305 0.00017296 deg
i 1.04566496789418 3.5537e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3741  
   data-arc span      42026 days (115.06 yr)  
   first obs. used      1905-12-27  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45535  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:50:20  

Additional Information
 Jupiter MOID = 1.75549 au 
 T_jup = 3.198 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.421128727362612E-16 -2.907880844642381E-15 2.719051705694744E-13 -1.437575308273375E-15 4.335967023806386E-14 -1.751828738932917E-17
q -2.907880844642381E-15 9.065637764902901E-15 -9.370010673195125E-13 5.554133577285237E-15 -1.534631803155681E-13 1.14718815872942E-16
tp 2.719051705694744E-13 -9.370010673195125E-13 2.882763696661445E-9 1.126829988431752E-11 5.091168430136075E-10 3.773935098567978E-15
node -1.437575308273375E-15 5.554133577285237E-15 1.126829988431752E-11 2.98295162095901E-8 -2.982284604094193E-8 -5.903744857390527E-11
peri 4.335967023806386E-14 -1.534631803155681E-13 5.091168430136075E-10 -2.982284604094193E-8 2.991602074957358E-8 5.902285037797735E-11
i -1.751828738932917E-17 1.14718815872942E-16 3.773935098567978E-15 -5.903744857390527E-11 5.902285037797735E-11 1.262845686490229E-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 11.35   n/a E2021B10  
diameter diameter 33.027 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 45.479 h n/a LCDB (Rev. 2020-October); 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.069   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

848 Inna (A915 RQ)          Discovered 1915-Sep-05 by Neujmin, G. at Simeis
Independent discovery Sept. 9 by M. Wolf, Heidelberg, was announced first.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A915 RQ = 1932 WJ = 1934 AC = 1934 CM1 = 1934 CV = 1937 RD = 1959 TJ = A905 YA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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