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2292 Seili (1942 RM)
Classification: Main-belt Asteroid          SPK-ID: 2002292
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2365212946461814 3.9929e-08  
a 2.621112403068122 1.1022e-08 au
q 2.001163504081286 1.03e-07 au
i 14.52784470199949 4.1146e-06 deg
node 172.4327291703028 1.6108e-05 deg
peri 129.2542019481864 1.7719e-05 deg
M 151.1782286751667 8.8623e-06 deg
tp 2458349.600936235842
(2018-Aug-19.10093624)
3.6619e-05 TDB
period 1549.982858038261
4.24
9.7767e-06
2.677e-08
d
yr
n .232260633163153 1.465e-09 deg/d
Q 3.241061302054958 1.3629e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2300  
   data-arc span      28352 days (77.62 yr)  
   first obs. used      1942-09-07  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41825  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:37:54  

Additional Information
 Earth MOID = 1.0201 au 
 Jupiter MOID = 2.20478 au 
 T_jup = 3.320 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457047.5 (2015-Jan-25.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2379300872224704 3.9862e-08  
q 1.996156302978801 1.029e-07 au
tp 2456801.329928112165
(2014-May-23.82992811)
3.4514e-05 TDB
node 172.4733388059725 1.6094e-05 deg
peri 129.3282434462668 1.7686e-05 deg
i 14.53859956995488 4.1184e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2300  
   data-arc span      28352 days (77.62 yr)  
   first obs. used      1942-09-07  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41825  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:37:54  

Additional Information
 Jupiter MOID = 2.20478 au 
 T_jup = 3.320 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.588951381060002E-15 -4.088974929505529E-15 1.838363962275782E-13 -1.639597329608629E-15 1.820192938855929E-14 1.366539059830959E-17
q -4.088974929505529E-15 1.058874261473226E-14 -4.666358248915122E-13 3.914519335710101E-15 -4.391034845103039E-14 1.605792763318867E-17
tp 1.838363962275782E-13 -4.666358248915122E-13 1.191244737447384E-9 -2.19300631724615E-12 2.721654474694642E-10 -2.260484557515037E-12
node -1.639597329608629E-15 3.914519335710101E-15 -2.19300631724615E-12 2.59018752208709E-10 -2.505816311343656E-10 -9.166707264226316E-12
peri 1.820192938855929E-14 -4.391034845103039E-14 2.721654474694642E-10 -2.505816311343656E-10 3.127848983714908E-10 8.349892112885708E-12
i 1.366539059830959E-17 1.605792763318867E-17 -2.260484557515037E-12 -9.166707264226316E-12 8.349892112885708E-12 1.696144366866278E-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 11.7   n/a MPO431521  
diameter diameter 11.335 km 0.292 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.121 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.242   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2292 Seili (1942 RM)          Discovered 1942-Sep-07 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1942 RM = 1959 TD = 1971 HS = 1975 FU = 1975 GN1 = 1980 PO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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