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18595 (1998 BR1)
Classification: Main-belt Asteroid          SPK-ID: 2018595
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2557486100600945 1.1888e-08  
a 2.367706637479069 6.2083e-09 au
q 1.762168955913737 2.7867e-08 au
i 5.831391460026851 1.0584e-06 deg
node 43.81471558309336 4.7455e-06 deg
peri 312.3290943945581 7.0009e-06 deg
M 202.206581761542 4.3996e-06 deg
tp 2459783.779412544010
(2022-Jul-23.27941254)
1.7797e-05 TDB
period 1330.730970023858
3.64
5.2339e-06
1.433e-08
d
yr
n .270528009123847 1.064e-09 deg/d
Q 2.973244319044401 7.7961e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2182  
   data-arc span      11461 days (31.38 yr)  
   first obs. used      1989-10-28  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45977  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:32:49  

Additional Information
 Earth MOID = .763123 au 
 Jupiter MOID = 2.48576 au 
 T_jup = 3.495 
[ show covariance matrix ]

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 13.79   n/a E2021B10  
diameter diameter 11.510 km 0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.02033 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.042   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18595 (1998 BR1)          Discovered 1998-Jan-19 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 BR1 = 1999 GY4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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