| 词条 | Anthe (moon) |
| 释义 |
| discoverer = Cassini Imaging Team {{sfn|Cassini Imaging Team}} | period = 1.05089 d | dimensions = 1.8 km [1] | density = 0.5 g/cm³ | name = Anthe | image = Anthe N1832831075 1.jpg | caption = Anthe is the ellipsoid in the center | discovered = May 30, 2007 | orbit_ref = {{sfn|IAUC 8857}} | epoch = | semimajor = 197,700 km | eccentricity = 0.0011 | inclination = 0.1° to Saturn's equator | satellite_of = Saturn | avg_speed = 13.824 km/s | mean_radius = 0.9 km | circumference = ≈ 5.7 km | mass = 1.5{{e|12}} kg[2] | volume = 3 km³ | surface_area = 10.18 km² | surface_grav = 0.00012 m/s² (0.12mm/s²) | escape_velocity = ≈ 0.56 m/s (≈ 2km/h) | rotation = assumed synchronous | axial_tilt = | albedo = }} Anthe ({{IPAc-en|ˈ|æ|n|θ|iː}} {{respell|AN|thee}}; Greek: Άνθη) is a very small natural satellite of Saturn lying between the orbits of Mimas and Enceladus. It is also known as Saturn XLIX; its provisional designation was S/2007 S 4. It is named after one of the Alkyonides; the name means flowery. It is the sixtieth confirmed moon of Saturn.{{sfn|Agle|2007}} It was discovered by the Cassini Imaging Team{{sfn|Cassini Imaging Team}} in images taken on 30 May 2007.{{sfn|IAUC 8857}} Once the discovery was made, a search of older Cassini images revealed it in observations from as far back as June 2004. It was first announced on 18 July 2007.{{sfn|IAUC 8857}} Anthe is visibly affected by a perturbing 10:11 mean-longitude resonance with the much larger Mimas. This causes its osculating orbital elements to vary with an amplitude of about 20 km in semi-major axis on a timescale of about 2 Earth years. The close proximity to the orbits of Pallene and Methone suggests that these moons may form a dynamical family. Material blasted off Anthe by micrometeoroid impacts is thought to be the source of the Anthe Ring Arc, a faint partial ring about Saturn co-orbital with the moon first detected in June 2007.{{sfn|Porco et al., 2008}}{{sfn|Hedman et al., 2009}} {{clear left}}References
1. ^[https://solarsystem.nasa.gov/planets/anthe/facts] .2. ^[https://solarsystem.nasa.gov/planets/anthe/facts] }}
| publisher = Cassini Imaging Central Laboratory for OPerationS | title = Cassini Imaging Science Team | url = http://ciclops.org/team/iss_team.php | accessdate = 2012-01-01 | ref = {{sfnRef|Cassini Imaging Team}}
| last = Agle | first = D. C. | date = July 19, 2007 | title = Saturn Turns 60 | publisher = JPL/NASA | work = Cassini Solstice Mission | url = http://saturn.jpl.nasa.gov/news/cassinifeatures/feature20070719/ | accessdate = 2012-01-01 | ref = harv
| last = Green | first = Daniel W. E. | title = S/ 2007 S 4 | date = July 18, 2007 | journal = IAU Circular | volume = 8857 | url = http://www.cbat.eps.harvard.edu/iauc/08800/08857.html | accessdate = 2012-01-01 | ref = {{sfnRef|IAUC 8857}}
| last2=Murray |first2=C. D. |last3=Cooper|first3=N. J. | last4=Tiscareno|first4=M. S. |last5=Beurle|first5=K. | last6=Evans|first6=M. W. |last7=Burns|first7=J. A. |title=Three tenuous rings/arcs for three tiny moons |journal=Icarus |volume=199 |issue=2 |date=2008-11-25 |pages=378–386 |issn=0019-1035 |doi=10.1016/j.icarus.2008.11.001 | ref = {{sfnRef|Hedman et al., 2009}} |bibcode = 2009Icar..199..378H }}
| first = et al. | title = More Ring Arcs for Saturn | work = Cassini Imaging Central Laboratory for Operations | date = 2008-09-05 | url = http://ciclops.org/view_event/90/More_Ring_Arcs_for_Saturn | accessdate = 2008-09-05 | ref = {{sfnRef|Porco et al., 2008}} External links{{Commons category-inline|Anthe}}{{Spoken Wikipedia|Anthe (moon).ogg|2010-01-16}}
2 : Moons of Saturn|Astronomical objects discovered in 2007 |
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