C/2020 R7 (ATLAS) |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
Nearest approach | 15 Jul 2022 | 14.0 | 3.022 AU | 2.180 AU | 18h34m | -61°10' | 139.0° | 12.8° | 22° |
Perihelion | 16 Sep 2022 | 14.5 | 2.955 AU | 2.947 AU | 16h41m | -33°23' | 80.7° | 19.6° | 100° |
Today | 27 Apr 2024 | 18.9 | 6.137 AU | 5.773 AU | 15h40m | +57°34' | 106.6° | 9.0° | 201° |
C/2020 R7 (ATLAS)- 2024-04-27
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/2020 R7 (ATLAS) are:
e (Eccentricity) : 1.0001500
q (Perihelion distance) : 2.9551110
i (Inclination) : 114.90250
Ω (Longitude of ascending node) : 268.29880
ω (Argument of perihelion) : 347.82540
L (Longitude of perihelion) : 273.48955
B (Latitude of perihelion) : -11.02772
T (Time of perihelion passage) : 2459838.70590
Epoch : 2024 Apr 26
Reference : MPEC 2024-H50
Classification(s): : Nearly isotropic; New (a > 10000 AU)
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 (7.00 + 5 log[∆] + 8.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 7.80 + 5 log[∆] + 9.31 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
2024-04-27 00:00 UT 15 40 31.2 +57 34 00 5.772 6.137 106.6 9.0 201 18.9
2024-04-27 01:45 UT 15 40 24.9 +57 34 31 5.773 6.137 106.6 9.0 201 18.9
2024-04-28 00:00 UT 15 39 04.6 +57 40 49 5.782 6.144 106.4 9.0 199 18.9
2024-04-29 00:00 UT 15 37 37.4 +57 47 23 5.792 6.151 106.3 9.0 198 19.0
2024-04-30 00:00 UT 15 36 09.5 +57 53 43 5.802 6.158 106.1 9.0 197 19.0
2024-05-01 00:00 UT 15 34 41.2 +57 59 48 5.813 6.165 105.9 9.0 195 19.0
2024-05-02 00:00 UT 15 33 12.2 +58 05 39 5.823 6.172 105.6 9.0 194 19.0
2024-05-03 00:00 UT 15 31 42.9 +58 11 15 5.834 6.179 105.4 9.0 193 19.0
2024-05-04 00:00 UT 15 30 13.1 +58 16 36 5.845 6.186 105.2 9.1 191 19.0
2024-05-05 00:00 UT 15 28 43.0 +58 21 42 5.856 6.193 105.0 9.1 190 19.0
2024-05-06 00:00 UT 15 27 12.5 +58 26 33 5.867 6.200 104.7 9.1 189 19.0
2024-05-07 00:00 UT 15 25 41.8 +58 31 10 5.878 6.207 104.4 9.1 187 19.0
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.