C/2017 K4 (ATLAS) |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
Nearest approach | 3 Jul 2017 | 16.8 | 3.244 AU | 2.316 AU | 16h52m | -36°18' | 151.2° | 8.7° | 71° |
Perihelion | 7 Jan 2018 | 16.9 | 2.664 AU | 3.570 AU | 20h32m | -15°28' | 19.6° | 7.1° | 67° |
Today | 31 Oct 2024 | 28.0 | 16.367 AU | 15.851 AU | 06h35m | +30°25' | 119.8° | 3.0° | 269° |
C/2017 K4 (ATLAS)- 2024-10-31
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.)
The orbital elements of C/2017 K4 (ATLAS) are:
e (Eccentricity) : 0.9072110
q (Perihelion distance) : 2.6635700
i (Inclination) : 16.65690
Ω (Longitude of ascending node) : 298.92790
ω (Argument of perihelion) : 15.35860
L (Longitude of perihelion) : 313.67067
B (Latitude of perihelion) : 4.35404
T (Time of perihelion passage) : 2458126.44910
P (Orbital period in years) : 153.80
Epoch : 2023 Jan 31
Reference : MPC114598
Classification(s): : Nearly isotropic; Returning (a < 10000 AU); Halley type (P < 200 years)
The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC.
The gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (10.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 9.84 + 5 log[∆] + 10.00 log[r]).
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.
A more printer-friendly version of the same chart can be found further down this page as well.
The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.
A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
Ephemerides:
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2024-10-31 00:00 UT 06 35 36.8 +30 25 49 15.852 16.367 119.7 3.0 269 28.0
2024-10-31 01:08 UT 06 35 36.5 +30 25 50 15.851 16.367 119.8 3.0 269 28.0
2024-11-01 00:00 UT 06 35 29.9 +30 26 10 15.842 16.372 120.7 3.0 269 28.0
2024-11-02 00:00 UT 06 35 22.7 +30 26 31 15.832 16.376 121.8 3.0 269 28.0
2024-11-03 00:00 UT 06 35 15.2 +30 26 52 15.822 16.381 122.8 2.9 269 28.0
2024-11-04 00:00 UT 06 35 07.5 +30 27 14 15.813 16.385 123.8 2.9 269 28.0
2024-11-05 00:00 UT 06 34 59.5 +30 27 35 15.803 16.390 124.8 2.8 268 28.0
2024-11-06 00:00 UT 06 34 51.2 +30 27 56 15.794 16.394 125.8 2.8 268 28.0
2024-11-07 00:00 UT 06 34 42.7 +30 28 17 15.785 16.399 126.8 2.8 268 28.0
2024-11-08 00:00 UT 06 34 33.9 +30 28 38 15.776 16.403 127.9 2.7 268 28.0
2024-11-09 00:00 UT 06 34 24.9 +30 28 58 15.767 16.408 128.9 2.7 268 28.0
2024-11-10 00:00 UT 06 34 15.6 +30 29 19 15.759 16.412 129.9 2.7 267 28.0
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.