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48 Doris
Classification: Main-belt Asteroid          SPK-ID: 2000048
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 152 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07354022104815289 2.578e-08  
a 3.109449040251699 7.9248e-09 AU
q 2.880779470493623 8.0603e-08 AU
i 6.54747181398949 3.0152e-06 deg
node 183.579878261308 2.7486e-05 deg
peri 253.5676883203605 3.4113e-05 deg
M 141.4663051756963 2.0373e-05 deg
tp 2456213.501141569895
(2012-Oct-13.00114157)
0.00011304 JED
period 2002.735483074676
5.48
7.6563e-06
2.096e-08
d
yr
n .1797541427923943 6.8719e-10 deg/d
Q 3.338118610009776 8.5076e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1992  
   data-arc span      56787 days (155.47 yr)  
   first obs. used      1860-02-27  
   last obs. used      2015-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59261  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 13:53:40  

Additional Information
 Earth MOID = 1.90435 AU 
 T_jup = 3.205 
[ 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 6.90 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
diameter diameter 221.80 km 7.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
rotation period rot_per 11.89 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Higgins, D.; Pilcher, F. (2009) Minor Planet Bul. 36, 143-144.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.0624   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
B-V BV .716 mag .012 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=9; phase (min.=3.85, mean=7.88, max.=12.86) deg.
U-B UB .442 mag .016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=9; phase (min.=3.85, mean=7.88, max.=12.86) deg.
Tholen spectral type spec_T CG   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 6 color indices
SMASSII spectral type spec_B Ch   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)

48 Doris          Discovered 1857-Sep-19 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1948 FE 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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