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Asteroids with Satellites Database--Johnston's Archive
(41) Daphneand Peneius
compiled by Wm. Robert Johnston
last updated17 March 2024--Orbital and physical data--
(Seethis page for definitions of quantities; source codes in brackets, seethis link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)
dynamical type, primary:main belt asteroid
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 2.7631602516 AU | | orbital periodP: | 4.5932206812 yr
(= 1677.6738538 d) | | eccentricitye: | 0.2739814227 | | perihelion distanceq: | 2.0061056746 AU | | aphelion distanceQ: | 3.5202148285 AU | | inclinationi: | 15.78455688° | | argument of perihelionω: | 46.10771973° | | ascending nodeΩ: | 178.05684169° | | mean anomalyM: | 117.81607274° | | perihelion passageTP: | 2022 Mar 12.9529311 | | Epoch: | 2023 Sep 13 | | data arc: | 1866-2024(7336 obs.) | | Earth MOID: | 1.03121 AU | | Jupiter Tisserand invariantTJ: | 3.232 |
orbital data, secondary: | semimajor axisas: | 461.3± 1.9 km[E22a] | | separation/primary radiusas/rp: | 5.1 [*D] | | separation/Hill radiusas/rH: | 0.015 [*D] | | orbital periodPs: | 1.1374464± 0.0000008d [E22a] | | eccentricityes: | 0.008± 0.0033[E22a] | | inclinationis: | 128.2° ± 0.6° [E22a] | | ascending nodeΩs: | 272.9° ± 0.6° [E22a] | | argument of pericenterωs: | 186° ± 19° [E22a] | | mean anomalyM: | 346° ± 19° [E22a] | | Epoch: | 2008 Mar 25.1 | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 7.12[MPC]
7.64 [JPL] | | slope parameterG: | 0.1 [JPL] | | effective diameterdE: | 179.61± 2.58 km [U11a] | | geometric albedo: | 0.078± 0.003[U11a] | | color indexU-B: | 0.363[T95a] | | color indexB-V: | 0.726[T95a] | | color indexJ-H: | 0.348 ± 0.033 [S10b] | | taxonomic type: | Ch (SMASSII) [JPL]
C (Tholen) [JPL] | | massm: | 6.01x1018 ± 7.5x1016kg [E22a] | | densityρ: | 1.95± 0.15 g/cm3[C08b] | | Hill radiusrH: | 30000 km [*D] |
other data, primary: | diameterdp: | 179.61± 2.58 km [U11a] | | axial ratiosa/b, b/c: | 1.37, 1 [D95a] | | rotation periodRPp: | 5.9879856± 0.0000007h [D95a] | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | 163 ± 5°,31 ± 8° [D95a] |
other data, secondary: | diameterds: | <2km [C08a] | | diameter ratiods/dp: | 0.011 [*D] | | component mag. differenceΔM: | 10 [I8930] | | rotation periodRPs: | ? | |
|
--(41) Daphne and Peneius --discovery and notes:
Primary discovered1856 May 22from Paris, Franceby H. Goldschmidt.Alternate designation(s): 1949 TG.Permanent number assigned 1856.
Named 1856 for the Greek mythological daughter of Terra [-].
Companion discovered2008 Mar 28 by A. R. Conrad, W. J. Merline, J. D. Drummond, P. M. Tamblyn, C. Dumas, B. X. Carry, R. D. Campbell, R. W. Goodrich, W. M. Owen, and C. R. Chapmanusingadaptive optics telescope observations from W. M. Keck II Telescope, Mauna Kea, Hawaii, USA.Announced2008 Mar 31 [C08a].Provisional designation S/2008 (41) 1.Permanent designation I Peneius, assigned 2019 Mar 06 [].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Matter, Alexis, Delbo, Marco, Ligori, Sebastiano, Crouzet, Nicolas, & Tanga, Paolo 2013, IcarusCorrigendum to "Determination of physical properties of the Asteroid (41) Daphne from interferometric observations in the thermal infrared" [Icarus 215 (2011) 47-56]
- Matter, Alexis, Delbo, Marco, Ligori, Sebastiano, Crouzet, Nicolas, & Tanga, Paolo 2011, IcarusDetermination of physical properties of the Asteroid (41) Daphne from interferometric observations in the thermal infrared
- Takahashi, Jun, Itoh, Yoichi, & Takahashi, Shigeru 2011, Publications of the Astronomical Society of JapanMid-Infrared Spectroscopy of 11 Main-Belt Asteroids
- Somers, James M., Hicks, M. D., & Lawrence, K. J. 2008, Bulletin of the American Astronomical SocietyOptical Characterization of Planetary Radar Targets
- Conrad, Al, Carry, B., Drummond, J. D., Merline, W. J., Dumas, C., Owen, W. M., Chapman, C. R., Tamblyn, P. M., Goodrich, R. W., & Campbell, R. D. 2008, Bulletin of the American Astronomical SocietyShape and Size of Asteroid (41) Daphne from AO Imaging
- Drummond, Jack D., Merline, W. J., Conrad, A., Dumas, C., & Carry, B. 2008, Bulletin of the American Astronomical SocietyStandard Triaxial Ellipsoid Asteroids from AO Observations
- Conrad, A. R., Keck Observatory, W. M., Merline, W. J., Drummond, J. D., Tamblyn, P. M., Dumas, C., Carry, B. X., Campbell, R. D., Goodrich, R. W., Owen, W. M., & Chapman, C. R. 2008, International Astronomical Union CircularS/2008 (41) 1
- Merline, W. J., Conrad, A. R., Drummond, J. D., Carry, B., Dumas, C., Tamblyn, P. M., Chapman, C. R., Owen, W. M., Durda, D. D., Campbell, R. D., & Goodrich, R. W. 2008, LPI ContributionsDiscovery of an Extreme Mass-Ratio Satellite of (41) Daphne in a Close Orbit
- Durech, J. & Kaasalainen, M. 2004, Bulletin of the American Astronomical SocietyAsteroid Shape Models Refined By Stellar Occultation Silhouettes
- Volquardsen, E. L., Rivkin, A. S., & Bus, S. J. 2004, Bulletin of the American Astronomical SocietyImproved 3 micron Band Determination in the Spectra of Aqueously Altered Asteroid Regoliths
- Bus, S. & Binzel, R. P. 2004, NASA Planetary Data System41 Daphne CCD Spectrum
- Kaasalainen, M., Torppa, J., & Piironen, J. 2002, Astronomy and AstrophysicsBinary structures among large asteroids
- Thuillot, W., Berthier, J., Arlot, J.-E., Fienga, A., Hestroffer, D., Colas, F., & Descamps, P. 1999, Bulletin of the American Astronomical SocietyAstrometric parameters of asteroids from stellar occultations
- Gehrels, T., Drummond, J. D., & Levenson, N. A. 1987, IcarusThe absence of satellites of asteroids
- Barucci, M. A., Fulchignoni, M., Burchi, R., & D'Ambrosio, V. 1985, IcarusRotational properties of ten main belt asteroids - Analysis of the results obtained by photoelectric photometry
- Barucci, M. A. 1983, Astronomy and Astrophysics Supplement SeriesEstimate of the shape and pole coordinates for the asteroid 41 Daphne
- 1980, The AstronomerAsteroidal notes
- Wallentine, Derek N. 1977, Journal of the American Association of Variable Star Observers (JAAVSO)Asteroid Photometry and the ALPO Minor Planet Section
- Scaltriti, F. & Zappala, V. 1977, Astronomy and AstrophysicsPhotoelectric photometry of the minor planets 41 Daphne and 129 Antigone
- 1948, Minor Planet CircularsObservations of (41) Daphne Made at Monte Mario, Rome
- Loreta, Eppe 1939, Gazette AstronomiqueObservations de l'eclat des petites planetes (1) Ceres, (7) Iris, (18) Melpomene et (41) Daphne
- Barton, S. G. 1907, Astronomische NachrichtenEphemeris of (41) Daphne
- 1867, Annales de l'Observatoire de Paris. ObservationsAscensions droites et distances polaires des petites Planètes.
- Luther, R. 1866, Astronomische NachrichtenNeue Ephemeride der Daphne (41). Von Herrn Director, Dr. R. Luther
- 1866, Annales de l'Observatoire de Paris. ObservationsAscensions droites et distances polaires des petites Planètes.
- Carl, Philipp 1863, Astronomische NachrichtenEphemeride der Daphne (41), von Herrn Dr. Carl in München
- 1862, Monthly Notices of the Royal Astronomical SocietyMinor Planet 41 Daphne, 75 ?
- Förster, W. & Tietjen, F. 1862, Astronomische NachrichtenElemente und Ephemeride des Planeten (41) Daphne Cometen-Beobachtungen auf der Berliner Sternwarte, von Herrn W. Förster und F. Tietjen
- Schubert, Ernest 1858, The Astronomical JournalOn the new asteroid taken and observed in 1857 for (41) Daphne
©2008-2019, 2024by Wm. Robert Johnston.
Last modified17 March 2024.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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