C/2018 E2 (Barros) |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
Perihelion | 23 Dec 2017 | 19.4 | 3.920 AU | 3.874 AU | 06h45m | -70°53' | 85.4° | 14.5° | 351° |
Nearest approach | 18 Jan 2018 | 19.3 | 3.926 AU | 3.819 AU | 05h16m | -64°56' | 88.9° | 14.5° | 38° |
Today | 7 Jul 2025 | 29.6 | 18.463 AU | 19.017 AU | 03h05m | +60°06' | 55.6° | 2.6° | 285° |
C/2018 E2 (Barros)- 2025-07-07
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/2018 E2 (Barros) are:
e (Eccentricity) : 0.9985170
q (Perihelion distance) : 3.9201420
i (Inclination) : 97.61290
Ω (Longitude of ascending node) : 67.14660
ω (Argument of perihelion) : 277.44560
L (Longitude of perihelion) : 112.53693
B (Latitude of perihelion) : -79.36674
T (Time of perihelion passage) : 2458111.00210
P (Orbital period in years) : 135906.73
Epoch : 2023 Jan 31
Reference : MPEC 2022-N37
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 light curve is based on the absolute magnitude and slope parameter as calculated from an MPEC, or the latest values provided by the minor planet center. (10.50 + 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
2025-07-07 00:00 UT 03 05 27.6 +60 06 16 19.017 18.462 55.6 2.6 285 29.6
2025-07-07 02:39 UT 03 05 28.8 +60 06 33 19.017 18.463 55.6 2.6 285 29.6
2025-07-08 00:00 UT 03 05 38.4 +60 08 46 19.014 18.467 56.1 2.6 284 29.6
2025-07-09 00:00 UT 03 05 49.0 +60 11 16 19.010 18.472 56.7 2.6 283 29.6
2025-07-10 00:00 UT 03 05 59.2 +60 13 46 19.006 18.477 57.3 2.7 282 29.6
2025-07-11 00:00 UT 03 06 09.1 +60 16 18 19.002 18.482 57.9 2.7 282 29.6
2025-07-12 00:00 UT 03 06 18.7 +60 18 49 18.997 18.487 58.5 2.7 281 29.6
2025-07-13 00:00 UT 03 06 28.0 +60 21 21 18.993 18.492 59.1 2.7 280 29.6
2025-07-14 00:00 UT 03 06 37.0 +60 23 54 18.988 18.497 59.7 2.7 279 29.6
2025-07-15 00:00 UT 03 06 45.6 +60 26 27 18.984 18.502 60.3 2.7 278 29.6
2025-07-16 00:00 UT 03 06 53.9 +60 29 01 18.979 18.507 60.9 2.8 278 29.6
2025-07-17 00:00 UT 03 07 01.9 +60 31 35 18.974 18.512 61.6 2.8 277 29.6
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.