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20325 Julianoey (1998 HO27)
Classification: Main-belt Asteroid          SPK-ID: 2020325
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07734658820643518 1.6846e-08  
a 2.379599647400071 7.3592e-09 au
q 2.19554573337644 4.164e-08 au
i 6.099758965695681 4.202e-07 deg
node 98.17009373252151 8.2299e-06 deg
peri 256.6403794183016 1.4486e-05 deg
M 301.9104661366274 1.3993e-05 deg
tp 2459416.846394284319
(2021-Jul-21.34639428)
5.2437e-05 TDB
period 1340.769959103833
3.67
6.2197e-06
1.703e-08
d
yr
n .268502435899312 1.2456e-09 deg/d
Q 2.563653561423703 7.9284e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2798  
   data-arc span      24241 days (66.37 yr)  
   first obs. used      1954-05-28  
   last obs. used      2020-10-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44668  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:11  

Additional Information
 Earth MOID = 1.19782 au 
 Jupiter MOID = 2.73995 au 
 T_jup = 3.527 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457157.5 (2015-May-15.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07641609991297807 1.6772e-08  
q 2.19743961982752 4.1357e-08 au
tp 2456735.757350817466
(2014-Mar-19.25735082)
5.0076e-05 TDB
node 98.23531706112585 8.2219e-06 deg
peri 256.5166346372575 1.4571e-05 deg
i 6.102222254040071 4.2042e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2798  
   data-arc span      24241 days (66.37 yr)  
   first obs. used      1954-05-28  
   last obs. used      2020-10-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44668  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:11  

Additional Information
 Jupiter MOID = 2.73995 au 
 T_jup = 3.527 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.812835282266524E-16 -6.842340165357704E-16 5.95967875086748E-13 -2.565563280376565E-14 1.640143639271419E-13 -9.548841777527951E-16
q -6.842340165357704E-16 1.71037370111925E-15 -1.379854346786539E-12 6.221273294200812E-14 -3.773910394420874E-13 2.319639270480605E-15
tp 5.95967875086748E-13 -1.379854346786539E-12 2.507645797377196E-9 -1.346446586854233E-12 6.072049905382317E-10 -6.923679811464639E-13
node -2.565563280376565E-14 6.221273294200812E-14 -1.346446586854233E-12 6.760021025729559E-11 -6.622132224486515E-11 5.469737893872922E-13
peri 1.640143639271419E-13 -3.773910394420874E-13 6.072049905382317E-10 -6.622132224486515E-11 2.12317388957352E-10 -6.153763606352559E-13
i -9.548841777527951E-16 2.319639270480605E-15 -6.923679811464639E-13 5.469737893872922E-13 -6.153763606352559E-13 1.767570926635273E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.29   n/a E2021B10  
diameter diameter 4.942 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.24474 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pray, D.P.; Pravec, P.; Benishek, V.; Pollock, J.; et al. (2014) CBET 4039.]
geometric albedo albedo 0.416   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20325 Julianoey           Discovered 1998 Apr. 21 by Spacewatch at Kitt Peak.
Julian Oey (b. 1964) is a prolific asteroid photometrist, observing from Australia. He is the principal discoverer of four binary asteroids and co-discoverer of several others, using the photometry technique. He has written or co-authored a number of papers on binary and other asteroids. Name suggested by P. Pravec and A. Harris.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2016-06-20Last Updated: 2016-06-21

Alternate Designations
 1998 HO27 = 1977 TT6 = 2004 BB159 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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