|
C/2013 US10 (Catalina) |
| ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
| Perihelion | 16 Nov 2015 | 6.3 | 0.820 AU | 1.739 AU | 14h24m | -19°17' | 14.6° | 17.6° | 270° |
| Nearest approach | 17 Jan 2016 | 6.1 | 1.378 AU | 0.718 AU | 13h53m | +54°52' | 107.2° | 43.0° | 282° |
| Today | 10 Nov 2025 | 23.1 | 25.322 AU | 24.395 AU | 02h08m | +34°40' | 158.9° | 0.8° | 143° |
C/2013 US10 (Catalina)- 2025-11-10
astro.vanbuitenen.nl
The interactive orbit chart above shows the comet's path through the solar system and its position at the given date.
Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below.
(Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)
Light curve
The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS.
This lightcurve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 5.8 + 5 log[∆] + 7.4 log[r]). An additional green curve is displayed when an increase in apparent brightness is expected due to forward scattering of sunlight, which occurs when a dust-rich comet is located between the Earth and the Sun. (See Marcus 2007)
Charts
The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.
The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
Orbital elements
The orbital elements of C/2013 US10 (Catalina) are:
e (Eccentricity) : 1.0006210
q (Perihelion distance) : 0.8202940
i (Inclination) : 148.75930
Ω (Longitude of ascending node) : 186.41870
ω (Argument of perihelion) : 340.59350
L (Longitude of perihelion) : 203.18104
B (Latitude of perihelion) : -9.92307
T (Time of perihelion passage) : 2457343.40160
Epoch : 2020 Dec 03
Reference : MPC110080
Classification(s): : Nearly isotropic; New (a > 10000 AU)
Ephemerides
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2025-11-09 00:00 UT 02 08 59.5 +34 42 04 24.386 25.315 159.2 0.8 147 23.1
2025-11-10 00:00 UT 02 08 48.2 +34 41 01 24.392 25.320 159.0 0.8 144 23.1
2025-11-10 09:26 UT 02 08 43.8 +34 40 36 24.395 25.322 158.9 0.8 143 23.1
2025-11-11 00:00 UT 02 08 36.9 +34 39 57 24.399 25.325 158.7 0.8 141 23.1
2025-11-12 00:00 UT 02 08 25.8 +34 38 53 24.406 25.329 158.4 0.8 138 23.1
2025-11-13 00:00 UT 02 08 14.6 +34 37 48 24.413 25.334 158.0 0.8 136 23.1
2025-11-14 00:00 UT 02 08 03.6 +34 36 42 24.421 25.339 157.6 0.9 133 23.1
2025-11-15 00:00 UT 02 07 52.6 +34 35 35 24.429 25.344 157.1 0.9 130 23.1
2025-11-16 00:00 UT 02 07 41.6 +34 34 28 24.437 25.348 156.7 0.9 128 23.1
2025-11-17 00:00 UT 02 07 30.8 +34 33 20 24.445 25.353 156.1 0.9 126 23.1
2025-11-18 00:00 UT 02 07 20.0 +34 32 12 24.454 25.358 155.6 0.9 124 23.1
2025-11-19 00:00 UT 02 07 09.4 +34 31 03 24.463 25.363 155.0 0.9 121 23.1
2025-11-20 00:00 UT 02 06 58.8 +34 29 53 24.472 25.368 154.4 1.0 119 23.1
Terminology:
delta: distance between comet and earth in AU
radius: distance between comet and sun in AU
magn: magnitude (brightness) estimate
ra: right ascension in hours (24h = 360deg)
dec: declination in degrees
elong: elongation in degrees (angle sun-earth-comet)
phase: phase angle in degrees (angle sun-comet-earth)
AU: Astronomical Unit (mean distance between earth and sun: 149597870.7 km
Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or the MPC (Minor Planet Center)
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.
