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7281 (1988 RX4)
Classification: Main-belt Asteroid          SPK-ID: 2007281
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .212396751150204 5.7835e-08  
a 2.41518043152955 1.1679e-08 AU
q 1.902203954431126 1.3866e-07 AU
i 3.57489308097201 5.7791e-06 deg
node 103.8778657593226 0.00010705 deg
peri 243.8863884905667 0.0001083 deg
M 297.4832195850665 1.9315e-05 deg
tp 2457038.576704289577
(2015-Jan-16.07670429)
7.4593e-05 JED
period 1370.953733947799
3.75
9.9443e-06
2.723e-08
d
yr
n .2625909183407261 1.9047e-09 deg/d
Q 2.928156908627975 1.416e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1155  
   data-arc span      23007 days (62.99 yr)  
   first obs. used      1950-06-15  
   last obs. used      2013-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57318  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 15:40:22  

Additional Information
 Earth MOID = .897397 AU 
 T_jup = 3.483 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9 mag n/a PDS3 (MPC 28284)  
rotation period rot_per 16.7 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Higgins, D.; Pravec, P.; Kusnirak, P.; Hornoch, K.; Brinsfield, J.W.; Allen, B.; Warner, B.D. (2008) Minor Planet Bul. 35, 123-126.]

7281 (1988 RX4)          Discovered 1988-Sep-02 by Debehogne, H. at La Silla (809)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1988 RX4 = 1992 UV2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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