39 Laetitia

<tr> <td align="center" colspan="2"> Epoch December 31, 2006 (JD 2454100.5)</td></tr><tr><th>Aphelion</th><td>461.503 Gm (3.085 AU)</td></tr><tr><th>Perihelion:</th> <td>366.877 Gm (2.452 AU)</td></tr><tr><th>Semi-major axis:</th> <td>414.190 Gm (2.769 AU)</td></tr><tr><th>Eccentricity:</th> <td>0.114</td></tr><tr><th>Orbital period:</th> <td>1682.713 d (4.61 a)</td></tr><tr><th>Avg. orbital speed:</th> <td>17.84 km/s</td></tr><tr><th>Mean anomaly:</th> <td>58.261°</td></tr><tr><th>Inclination:</th> <td>10.383°</td></tr><tr><th>Longitude of ascending node:</th> <td>157.168°</td></tr><tr><th>Argument of perihelion:</th> <td>209.560°</td></tr><tr><th style="background-color: #FFFFC0" colspan="2" align="center">Physical characteristics</td></tr><tr><th>Dimensions:</th> <td>149.5 km</td></tr><tr><th>Mass:</th> <td>~3.5Template:E kg</td></tr><tr><th>Mean density:</th> <td>2.0? g/cm³</td></tr><tr><th>Equatorial surface gravity:</th> <td>~0.0418 m/s²</td></tr><tr><th> Escape velocity:</th> <td>~0.0790 km/s</td></tr><tr><th>Rotation period:</th> <td>0.2141 d (5.138 h) ^[1]</td></tr><tr><th>Albedo:</th> <td>0.287 (geometric) ^[2]</td></tr><tr><th>Temperature:</th> <td>~158 K</td></tr><tr><th>Spectral type:</th> <td>S</td></tr><tr><th>Apparent magnitude:</th> <td>8.86 to 12.07</td></tr><tr><th>Absolute magnitude:</th> <td>6.1</td></tr><tr><th>Angular diameter:</th> <td>0.142" to 0.051"</td></tr>