Discovery [1] | |
---|---|
Discovered by | Hermann Mayer Salomon Goldschmidt |
Discovery site | Paris Observatory |
Discovery date | 5 May 1861 |
Designations | |
(70) Panopaea | |
Pronunciation | /pænəˈpiːə/ [2] |
Named after | Panopea |
main belt [3] | |
Adjectives | Panopaean |
Orbital characteristics [4] | |
Epoch 30 November 2008 | |
Aphelion | 3.0903 AU |
Perihelion | 2.1402 AU |
2.61526 AU | |
Eccentricity | 0.181641 |
1544.79 days (4.23 years) | |
264.193° | |
Inclination | 11.584° |
47.783° | |
256.016° | |
Physical characteristics | |
Dimensions | 122.17±2.3 km (mean) [5] |
Mass | (4.33 ± 1.09) × 1018 kg [6] |
Mean
density | 3.48 ± 1.05 [6] g/cm3 |
15.87 ± 0.04 hours [7] | |
0.0675 ± 0.003 [5] | |
C [8] | |
8.11 [9] | |
Panopaea ( minor planet designation: 70 Panopaea) is a large main belt asteroid. Its orbit is close to those of the Eunomia asteroid family; however, Panopaea is a dark, primitive carbonaceous C-type asteroid in contrast to the S-type asteroids of the Eunomian asteroids. The spectra of the asteroid displays evidence of aqueous alteration. [10] Photometric studies give a rotation period of 15.797 hours and an amplitude of 0.11±0.01 in magnitude. Previous studies that suggested the rotation period may be twice this amount were rejected based upon further observation. [11]
Panopaea was discovered by Hermann Goldschmidt on 5 May 1861. [1] It was his fourteenth and last asteroid discovery. It is named after Panopea, a nymph in Greek mythology; the name was chosen by Robert Main, President of the Royal Astronomical Society. [12] In 1862, Swedish astronomer Nils Christoffer Dunér gave a doctoral thesis on the orbital elements of this asteroid. [13]
The orbit of 70 Panopaea places it in a mean motion resonance with the planets Jupiter and Saturn. The computed Lyapunov time for this asteroid is 24,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets. [14]
The asteroid frequently makes close approaches with 16 Psyche, such as on 12 June 2040 when it will make a close approach of 0.00602 AU (2.34 Lunar distances, or approx. 770,000 km, 478,455 mi) to the asteroid, and on 2 June 2095 when it will come only 0.003372 AU (1.31 LD) to the asteroid. [3]
Discovery [1] | |
---|---|
Discovered by | Hermann Mayer Salomon Goldschmidt |
Discovery site | Paris Observatory |
Discovery date | 5 May 1861 |
Designations | |
(70) Panopaea | |
Pronunciation | /pænəˈpiːə/ [2] |
Named after | Panopea |
main belt [3] | |
Adjectives | Panopaean |
Orbital characteristics [4] | |
Epoch 30 November 2008 | |
Aphelion | 3.0903 AU |
Perihelion | 2.1402 AU |
2.61526 AU | |
Eccentricity | 0.181641 |
1544.79 days (4.23 years) | |
264.193° | |
Inclination | 11.584° |
47.783° | |
256.016° | |
Physical characteristics | |
Dimensions | 122.17±2.3 km (mean) [5] |
Mass | (4.33 ± 1.09) × 1018 kg [6] |
Mean
density | 3.48 ± 1.05 [6] g/cm3 |
15.87 ± 0.04 hours [7] | |
0.0675 ± 0.003 [5] | |
C [8] | |
8.11 [9] | |
Panopaea ( minor planet designation: 70 Panopaea) is a large main belt asteroid. Its orbit is close to those of the Eunomia asteroid family; however, Panopaea is a dark, primitive carbonaceous C-type asteroid in contrast to the S-type asteroids of the Eunomian asteroids. The spectra of the asteroid displays evidence of aqueous alteration. [10] Photometric studies give a rotation period of 15.797 hours and an amplitude of 0.11±0.01 in magnitude. Previous studies that suggested the rotation period may be twice this amount were rejected based upon further observation. [11]
Panopaea was discovered by Hermann Goldschmidt on 5 May 1861. [1] It was his fourteenth and last asteroid discovery. It is named after Panopea, a nymph in Greek mythology; the name was chosen by Robert Main, President of the Royal Astronomical Society. [12] In 1862, Swedish astronomer Nils Christoffer Dunér gave a doctoral thesis on the orbital elements of this asteroid. [13]
The orbit of 70 Panopaea places it in a mean motion resonance with the planets Jupiter and Saturn. The computed Lyapunov time for this asteroid is 24,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets. [14]
The asteroid frequently makes close approaches with 16 Psyche, such as on 12 June 2040 when it will make a close approach of 0.00602 AU (2.34 Lunar distances, or approx. 770,000 km, 478,455 mi) to the asteroid, and on 2 June 2095 when it will come only 0.003372 AU (1.31 LD) to the asteroid. [3]