C/2019 Y4 (ATLAS) - DISINTEGRATED |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
Disintegration | 1 Apr 2020 | 8.1 | 1.463 AU | 1.028 AU | 07h58m | +69°16' | 92.4° | 43.0° | 109° |
Nearest approach | 22 May 2020 | - | 0.367 AU | 0.777 AU | 03h43m | +38°29' | 18.3° | 120.2° | 350° |
Perihelion | 30 May 2020 | - | 0.256 AU | 0.870 AU | 03h35m | +19°51' | 13.0° | 117.4° | 259° |
Today | 27 Apr 2024 | - | 13.642 AU | 14.000 AU | 06h54m | +10°22' | 67.2° | 3.9° | 101° |
C/2019 Y4 (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/2019 Y4 (ATLAS) are:
e (Eccentricity) : 0.9992720
q (Perihelion distance) : 0.2563610
i (Inclination) : 45.08340
Ω (Longitude of ascending node) : 120.72480
ω (Argument of perihelion) : 177.44130
L (Longitude of perihelion) : 118.91756
B (Latitude of perihelion) : 1.81161
T (Time of perihelion passage) : 2459000.00630
P (Orbital period in years) : 6608.16
Epoch : 2024 Apr 26
Reference : MPEC 2024-A43
Classification(s): : Nearly isotropic; Returning (a < 10000 AU); External (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 (11.80 + 5 log[∆] + 15.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 6.43 + 5 log[∆] + 10.00 log[r]). The additional green curve shows the effect of forward scattering, occurring when the comet is between the earth and the sun, for a gas-to-dust light ratio δ90 of 0.50. (See Marcus 2007)
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 06 54 22.1 +10 22 11 13.996 13.641 67.4 3.9 101 23.5
2024-04-27 04:06 UT 06 54 23.5 +10 22 19 14.000 13.642 67.2 3.9 101 23.5
2024-04-28 00:00 UT 06 54 30.2 +10 22 58 14.018 13.647 66.5 3.9 101 23.5
2024-04-29 00:00 UT 06 54 38.5 +10 23 44 14.039 13.654 65.5 3.8 101 23.5
2024-04-30 00:00 UT 06 54 47.0 +10 24 30 14.061 13.660 64.6 3.8 102 23.5
2024-05-01 00:00 UT 06 54 55.7 +10 25 14 14.082 13.667 63.7 3.8 102 23.5
2024-05-02 00:00 UT 06 55 04.7 +10 25 58 14.104 13.673 62.8 3.8 102 23.5
2024-05-03 00:00 UT 06 55 13.9 +10 26 40 14.125 13.680 61.9 3.7 102 23.5
2024-05-04 00:00 UT 06 55 23.3 +10 27 22 14.146 13.686 61.0 3.7 103 23.5
2024-05-05 00:00 UT 06 55 32.9 +10 28 02 14.167 13.692 60.1 3.7 103 23.6
2024-05-06 00:00 UT 06 55 42.8 +10 28 42 14.188 13.699 59.2 3.6 103 23.6
2024-05-07 00:00 UT 06 55 52.9 +10 29 21 14.208 13.705 58.3 3.6 103 23.6
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.