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7977 (1977 QQ5)
Classification: Amor [NEO]          SPK-ID: 2007977
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .465395459381134 6.9704e-08  
a 2.227156537537638 1.1347e-08 AU
q 1.190647997636613 1.5585e-07 AU
i 25.1692302486358 1.0123e-05 deg
node 134.2281586812685 2.0315e-05 deg
peri 248.1096925372564 2.2878e-05 deg
M 64.87804351640006 1.7638e-05 deg
tp 2456781.713870641554
(2014-May-04.21387064)
5.8159e-05 JED
period 1214.016365168756
3.32
9.2781e-06
2.54e-08
d
yr
n .2965363650184054 2.2663e-09 deg/d
Q 3.263665077438663 1.6628e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      417  
   data-arc span      21348 days (58.45 yr)  
   first obs. used      1955-03-23  
   last obs. used      2013-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62026  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 19:08:07  

Additional Information
 Earth MOID = .359268 AU 
 T_jup = 3.384 
[ 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 15.2 mag n/a MPO266000  
rotation period rot_per 7.457 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Incomplete or inconclusive result.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) http://www.asu.cas.cz/~ppravec/neo.htm]
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

7977 (1977 QQ5)          Discovered 1977-Aug-21 by McNaught, R. H. at Siding Spring (413)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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