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JPL Small-Body Database Browser
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91020 (1998 DQ22)
Classification: Main-belt Asteroid          SPK-ID: 2091020
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06412447802071826 5.462e-08  
a 2.619315198099422 1.7772e-08 au
q 2.451352978249563 1.4644e-07 au
i 2.742789853911316 6.8926e-06 deg
node 309.8584471821865 0.00010279 deg
peri 256.4469937701283 0.0001159 deg
M 32.24874593503828 5.423e-05 deg
tp 2458861.795547897621
(2020-Jan-13.29554790)
0.00023308 TDB
period 1548.388977898318
4.24
1.5758e-05
4.314e-08
d
yr
n .2324997175377988 2.3662e-09 deg/d
Q 2.787277417949282 1.8911e-08 au
  Orbit Determination Parameters
   # obs. used (total)      518  
   data-arc span      8008 days (21.92 yr)  
   first obs. used      1998-02-24  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55235  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:22:05  

Additional Information
 Earth MOID = 1.44852 au 
 Jupiter MOID = 2.18457 au 
 T_jup = 3.401 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456631.5 (2013-Dec-05.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06569784615837675 5.4364e-08  
q 2.446492763448489 1.4621e-07 au
tp 2457311.186884568627
(2015-Oct-15.68688457)
0.00022595 TDB
node 309.9090890137222 0.00010275 deg
peri 256.0711147000455 0.00011531 deg
i 2.744268763692972 6.8919e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      518  
   data-arc span      8008 days (21.92 yr)  
   first obs. used      1998-02-24  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55235  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:22:05  

Additional Information
 Jupiter MOID = 2.18457 au 
 T_jup = 3.401 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.955405520948427E-15 -7.897197175986537E-15 -4.308481781721038E-12 9.924077280368794E-15 -8.758663175587062E-13 3.292499146335635E-16
q -7.897197175986537E-15 2.13772312743763E-14 1.154452280527497E-11 -2.696858660220089E-14 2.314720229121856E-12 -7.741231547240172E-16
tp -4.308481781721038E-12 1.154452280527497E-11 5.105197529103114E-8 -6.444515239608635E-12 1.1825714011461E-8 5.323287023454845E-12
node 9.924077280368794E-15 -2.696858660220089E-14 -6.444515239608635E-12 1.055663498937885E-8 -1.054449924043524E-8 1.342150569106477E-10
peri -8.758663175587062E-13 2.314720229121856E-12 1.1825714011461E-8 -1.054449924043524E-8 1.329575830810065E-8 -1.327898320419303E-10
i 3.292499146335635E-16 -7.741231547240172E-16 5.323287023454845E-12 1.342150569106477E-10 -1.327898320419303E-10 4.749826226205107E-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 15.8   n/a MPO320097  

91020 (1998 DQ22)          Discovered 1998-Feb-24 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 DQ22 = 2002 AO77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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