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41 Daphne

Main-belt asteroid


Main-belt asteroid

FieldValue
minorplanetyes
background#D6D6D6
name41 Daphne
image41 Daphne VLT (2021), deconvolved.pdf
discovery_ref
discovererH. Goldschmidt
discoveredMay 22, 1856
mpc_name(41) Daphne
alt_names1949 TG
pronounced
named_afterDaphne
adjectivesDaphnean
mp_categoryMain belt
orbit_ref
epoch31 December 2006 (JD 2454100.5)
semimajor2.765 AU (413.682 million km)
perihelion2.014 AU (301.220 million km)
aphelion3.517 AU (526.144 million km)
eccentricity0.272
period1679.618 day
inclination15.765°
asc_node178.159°
arg_peri46.239°
mean_anomaly247.500°
satellitesPeneius
(S/2008 (41) 1)
dimensions213×160 km
239x183x153 km
flattening0.35
mean_diameter
189 km
mass
≈ 6.8 kg
density
≈ 1.95 g/cm3
rotation5.988 hr
spectral_typeC
abs_magnitude7.61
albedo0.052 (calculated)

(S/2008 (41) 1) 239x183x153 km

189 km ≈ 6.8 kg ≈ 1.95 g/cm3

41 Daphne is a large asteroid from the asteroid belt.

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.

In 1999, Daphne occulted three stars, and on July 2, 1999, produced eleven chords indicating an ellipsoid of 213×160 km. Daphnean lightcurves also suggest that the asteroid is irregular in shape. Daphne was observed by Arecibo radar in April 2008. Based upon radar data, the near surface solid density of the asteroid is 2.4g cm−3.

Satellite

41 Daphne has at least one satellite, named Peneius (provisionally S/2008 (41) 1). It was identified on March 28, 2008, and has a projected separation of 443 km, an orbital period of approximately 1.1 days, 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. In Greek myth, Pēneios is the god of the river of that name, and father of Daphne.

Notes

References

| display-authors=1 | postscript=.

| access-date= 2013-04-07

|access-date=2008-12-01}} (1999-Jul-02 Chords)

|display-authors = 6 |url-status = dead |archive-url = https://web.archive.org/web/20090918181731/http://www2.keck.hawaii.edu/inst/people/conrad/research/pub/dps08oct2008v4b.pdf |archive-date = 2009-09-18}}

|access-date=2008-03-31}}

|access-date=2011-10-13}}

|access-date=2012-01-23}}

|access-date=2012-01-23}}

| display-authors = 1

| editor1-first = J. | editor1-last = Svoren | editor2-first = E. M. | editor2-last = Pittich | editor3-first = H. | editor3-last = Rickman

|access-date=2019-03-07}}

References

  1. "Daphne". [[Oxford University Press]].
  2. {{OED. Daphne
  3. P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. ''Astronomy & Astrophysics'' 54, A56
  4. (1863). "Appletons' annual cyclopaedia and register of important events of the year: 1862". [[D. Appleton & Company]].
  5. Using the [[Volume#Formulas. formula for volume of an ellipsoid]] ({{math
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