Charon - 2025 ACF Regionals

Question

Enhanced color images from the Ralph MVIC instrument show a large red area thought to be an impact crater on this object. For 10 points each:

[10h] Name this object that James Christy discovered from observing a time-varying bulge at the Naval Observatory Flagstaff Station. This astronomical object contains the Kubrick Mons.

ANSWER: Charon [or (134340) Pluto I; reject “Pluto”]

[10m] Charon and the other moons of Pluto were first imaged by this probe that contains the Ralph instrument. This probe launched in 2006 is expected to exit the Kuiper Belt in 2029.

ANSWER: New Horizons

[10e] The LEISA instrument aboard New Horizons determined that Pluto’s value of this quantity was due to surface ice. Enceladus has the highest value of this quantity in the solar system since its surface reflects nearly all light.

ANSWER: albedo

<Purdue, Other Science>

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Summary


California	2025-02-01	Y	3	20.00	100%	67%	33%
Florida	2025-02-01	Y	3	6.67	33%	33%	0%
Great Lakes	2025-02-01	Y	6	10.00	67%	17%	17%
Lower Mid-Atlantic	2025-02-01	Y	6	13.33	100%	33%	0%
Midwest	2025-02-01	Y	6	18.33	100%	83%	0%
North	2025-02-01	Y	3	10.00	67%	33%	0%
Northeast	2025-02-01	Y	5	20.00	100%	100%	0%
Pacific Northwest	2025-02-01	Y	2	25.00	100%	100%	50%
South Central	2025-02-01	Y	2	20.00	100%	50%	50%
Southeast	2025-02-01	Y	4	7.50	50%	25%	0%
Upper Mid-Atlantic	2025-02-01	Y	9	16.67	89%	78%	0%
Upstate NY	2025-02-01	Y	3	13.33	67%	67%	0%

Data


UC Berkeley A	Claremont A	0	10	10	20
Claremont B	UCSD	0	0	10	10
UC Berkeley B	UCLA	10	10	10	30
Florida A	Florida B	0	10	10	20
Valencia A	UCF B	0	0	0	0
UCF C	Florida State A	0	0	0	0
Carnegie Mellon A	Kenyon	0	0	10	10
Carnegie Mellon B	Michigan B	0	0	0	0
Case Western A	Michigan C	0	0	0	0
Ohio State A	Case Western B	0	0	10	10
Michigan A	Ohio State B	0	0	10	10
Michigan State	Michigan D	10	10	10	30
UNC B	Liberty C	0	10	10	20
South Carolina	Liberty A	0	0	10	10
UNC C	William & Mary	0	0	10	10
Virginia Tech A	UNC D	0	10	10	20
Duke	Virginia A	0	0	10	10
Liberty B	Wake Forest	0	0	10	10
Illinois C	Chicago A	0	10	10	20
Chicago C	Indiana B	0	10	10	20
Chicago D	WashU A	0	10	10	20
Chicago B	Indiana A	0	10	10	20
Missouri	Missoui S&T	0	10	10	20
Iowa State	Minnesota B	0	10	10	20
Wisconsin A	Winona State	0	0	10	10
Carleton	Wisconsin B	0	0	0	0
Brown A	BU	0	10	10	20
Dartmouth A	Tufts A	0	10	10	20
Harvard A	Harvard B	0	10	10	20
MIT A	Brandeis A	0	10	10	20
Brandeis B	UMass Boston	0	10	10	20
UBC	Alberta	10	10	10	30
UW B	UW A	0	10	10	20
ASU	Texas A	10	10	10	30
TAMU	Texas B	0	0	10	10
Illinois A	WashU B	0	0	10	10
Georgia Tech A	Louisville A	0	0	10	10
Tennessee A	Alabama A	0	10	0	10
Vanderbilt A	Bruin A	0	0	0	0
Columbia B	Cornell B	0	10	10	20
Haverford A	George Washington B	0	10	10	20
Vassar A	John Jay College	0	0	10	10
Maryland A	Yale A	0	10	10	20
Maryland B	Rutgers A	0	10	0	10
NYU A	Johns Hopkins A	0	0	10	10
Haverford B	NYU B	0	10	10	20
Columbia C	Penn A	0	10	10	20
Penn B	George Washington A	0	10	10	20
Georgia Tech D	Georgia Tech B	0	0	10	10
Binghamton A	ESF A	0	10	0	10
Cornell C	Cornell D	0	10	10	20
RIT A	RIT B	0	0	10	10