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v. 3.17.1a
C/2025 X1
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Name
P12iL57 → C/2025 X1
Type
Comet
Status
Actively Following
Source
Minor Planet Center
UTC date
------------ Any 1.0m ------------
LSC 1.0m - W85-87; (CTIO, Chile)
ELP 1.0m - V37,V39; (McDonald, Texas)
COJ 1.0m - Q63-64; (Siding Spring, Aust.)
CPT 1.0m - K91-93; (Sutherland, S. Africa)
TFN 1.0m - Z31,Z24; (Tenerife, Spain)
------------ Any 0.4m ------------
LSC 0.4m - W89,W79; (CTIO, Chile)
ELP 0.4m - V38; (McDonald, Texas)
ELP 0.4m - V98; (TEMP; McDonald, Texas)
ELP 0.4m - V99; (TEMP; McDonald, Texas)
OGG 0.4m - T03-04; (Maui, Hawaii)
COJ 0.4m - Q58-59; (Siding Spring, Aust.)
CPT 0.4m - L09; (Sutherland, S. Africa)
TFN 0.4m - Z17,Z21; (Tenerife, Spain)
------------ Any 2.0m ------------
FTS 2.0m - E10; (Siding Spring, Aust.) [MuSCAT4]
FTN 2.0m - F65; (Maui, Hawaii ) [MuSCAT3]
------------ Non LCO ------------
Mt John 1.8m - 474 (Mt John, NZ)
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Measurements
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Last Update: 2026-Jan-05 22:33
Orbital Elements
MPC Comet
Epoch of elements (MJD)
61095.0
Feb. 24, 2026
Orbital inclination in deg
36.98165
Longitude of Ascending Node (deg)
95.67593
Arg of perihelion (deg)
85.90681
Eccentricity
0.8654526
Perihelion distance (AU)
4.6608077
Epoch of perihelion
Dec. 12, 2026, 4:36 p.m.
Epoch of perihelion (MJD)
61386.69209
Total Magnitude (M1)
13.3
Slope Parameter (k1)
10.0
Physical Parameters
Phase Slope
MPC Default
4.0
Diameter
Initial Diameter Guess using H=13.3 and albedo=0.14 (0.01 to 0.5)
MPC Default
7770.71 m
+21305.0 / -3659.0
Follow-up Details
NEOCP
digest2
score
35
Number of observations
76
Arc length (days)
20.45
Time since last observation (days)
5.93
Spectroscopy Details
Known Taxonomies
None
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