Discovery [1] | |
---|---|
Discovered by | H. Goldschmidt |
Discovery date | May 22, 1856 |
Designations | |
(41) Daphne | |
Pronunciation | /ˈdæfni/ [2] |
Named after | Daphnē |
1949 TG | |
Main belt | |
Adjectives | Daphnean /ˈdæfniən/ [3] |
Orbital characteristics [1] | |
Epoch 31 December 2006 ( JD 2454100.5) | |
Aphelion | 3.517 AU (526.144 Gm) |
Perihelion | 2.014 AU (301.220 Gm) |
2.765 AU (413.682 Gm) | |
Eccentricity | 0.272 |
4.60 a (1,679.618 d) | |
247.500° | |
Inclination | 15.765° |
178.159° | |
46.239° | |
Known satellites | Peneius
/pɛˈniːəs/ (S/2008 (41) 1) |
Physical characteristics | |
Dimensions | c/a = 0.65±0.08
[4] 213×160 km [5] 239x183x153 km [6] |
187±13 km
[4] 205.5±1.9 [1] 189 km [7] | |
Mass | (6.1±0.9)×1018 kg
[4] ≈ 6.8×1018 kg [8] |
Mean
density | 1.78±0.45 g/cm3
[4] ≈ 1.95 g/cm³ [6] |
5.9 hr [1] | |
0.052 (calculated) [4] 0.083 [1] | |
C [1] | |
7.12 [1] | |
Daphne ( minor planet designation: 41 Daphne) is a large asteroid from the asteroid belt. [1] It is a dark-surfaced body 174 km in diameter is probably composed of primitive carbonaceous chondrites. The spectra of the asteroid displays evidence of aqueous alteration. [9] It was discovered by H. Goldschmidt on May 22, 1856, and named after Daphne, the nymph in Greek mythology who was turned into a laurel tree. Incorrect orbital calculations initially resulted in 56 Melete being mistaken for a second sighting of Daphne. Daphne was not sighted again until August 31, 1862. [10]
The orbit of 41 Daphne places it in a 9:22 mean motion resonance with the planet Mars. The computed Lyapunov time for this asteroid is 14,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets. [11]
In 1999, Daphne
occulted three
stars, and on July 2, 1999, produced eleven
chords indicating an ellipsoid of 213×160 km.
[5] Daphnean
lightcurves also suggest that the asteroid is irregular in shape. Daphne was observed by
Arecibo
radar in April 2008.
[12]
[13] Based upon radar data, the near surface solid density of the asteroid is 2.4+0.7
−0.5 g cm−3.
[14]
Designations | |
---|---|
(41) Daphne I Peneius | |
Pronunciation | /pɛˈniːəs/ |
S/2008 (41) 1 | |
Adjectives | Peneian /pɛˈniːən/ |
Orbital characteristics | |
Inclination | ° |
41 Daphne has at least one satellite, named Peneius (provisionally S/2008 (41) 1). [15] [16] It was identified on March 28, 2008, and has a projected separation of 443 km, an orbital period of approximately 1.1 days, [6] and an estimated diameter of less than 2 km. If these preliminary observations hold up, this binary system has the most extreme size ratio known. [17] In Greek myth, Pēneios is the god of the river of that name, and father of Daphne.
Discovery [1] | |
---|---|
Discovered by | H. Goldschmidt |
Discovery date | May 22, 1856 |
Designations | |
(41) Daphne | |
Pronunciation | /ˈdæfni/ [2] |
Named after | Daphnē |
1949 TG | |
Main belt | |
Adjectives | Daphnean /ˈdæfniən/ [3] |
Orbital characteristics [1] | |
Epoch 31 December 2006 ( JD 2454100.5) | |
Aphelion | 3.517 AU (526.144 Gm) |
Perihelion | 2.014 AU (301.220 Gm) |
2.765 AU (413.682 Gm) | |
Eccentricity | 0.272 |
4.60 a (1,679.618 d) | |
247.500° | |
Inclination | 15.765° |
178.159° | |
46.239° | |
Known satellites | Peneius
/pɛˈniːəs/ (S/2008 (41) 1) |
Physical characteristics | |
Dimensions | c/a = 0.65±0.08
[4] 213×160 km [5] 239x183x153 km [6] |
187±13 km
[4] 205.5±1.9 [1] 189 km [7] | |
Mass | (6.1±0.9)×1018 kg
[4] ≈ 6.8×1018 kg [8] |
Mean
density | 1.78±0.45 g/cm3
[4] ≈ 1.95 g/cm³ [6] |
5.9 hr [1] | |
0.052 (calculated) [4] 0.083 [1] | |
C [1] | |
7.12 [1] | |
Daphne ( minor planet designation: 41 Daphne) is a large asteroid from the asteroid belt. [1] It is a dark-surfaced body 174 km in diameter is probably composed of primitive carbonaceous chondrites. The spectra of the asteroid displays evidence of aqueous alteration. [9] It was discovered by H. Goldschmidt on May 22, 1856, and named after Daphne, the nymph in Greek mythology who was turned into a laurel tree. Incorrect orbital calculations initially resulted in 56 Melete being mistaken for a second sighting of Daphne. Daphne was not sighted again until August 31, 1862. [10]
The orbit of 41 Daphne places it in a 9:22 mean motion resonance with the planet Mars. The computed Lyapunov time for this asteroid is 14,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets. [11]
In 1999, Daphne
occulted three
stars, and on July 2, 1999, produced eleven
chords indicating an ellipsoid of 213×160 km.
[5] Daphnean
lightcurves also suggest that the asteroid is irregular in shape. Daphne was observed by
Arecibo
radar in April 2008.
[12]
[13] Based upon radar data, the near surface solid density of the asteroid is 2.4+0.7
−0.5 g cm−3.
[14]
Designations | |
---|---|
(41) Daphne I Peneius | |
Pronunciation | /pɛˈniːəs/ |
S/2008 (41) 1 | |
Adjectives | Peneian /pɛˈniːən/ |
Orbital characteristics | |
Inclination | ° |
41 Daphne has at least one satellite, named Peneius (provisionally S/2008 (41) 1). [15] [16] It was identified on March 28, 2008, and has a projected separation of 443 km, an orbital period of approximately 1.1 days, [6] and an estimated diameter of less than 2 km. If these preliminary observations hold up, this binary system has the most extreme size ratio known. [17] In Greek myth, Pēneios is the god of the river of that name, and father of Daphne.