2I/Borisov |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
Perihelion | 8 Dec 2019 | 15.6 | 2.007 AU | 1.994 AU | 11h28m | -18°19' | 76.4° | 28.5° | 290° |
Nearest approach | 28 Dec 2019 | 15.7 | 2.053 AU | 1.937 AU | 11h59m | -33°17' | 82.4° | 28.3° | 293° |
Today | 25 Dec 2024 | 34.6 | 36.413 AU | 37.253 AU | 17h59m | -53°39' | 30.5° | 0.8° | 188° |
2I/Borisov- 2024-12-25
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 2I/Borisov are:
e (Eccentricity) : 3.3566330
q (Perihelion distance) : 2.0065480
i (Inclination) : 44.05270
Ω (Longitude of ascending node) : 308.14800
ω (Argument of perihelion) : 209.12510
L (Longitude of perihelion) : 329.97095
B (Latitude of perihelion) : -19.78093
T (Time of perihelion passage) : 2458826.05480
Epoch : 2019 Dec 23
Reference : MPEC 2023-L37
Classification(s): : Interstellar
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 (11.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 11.11 + 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
2024-12-25 00:00 UT 17 59 12.5 -53 39 39 37.241 36.400 30.4 0.8 187 34.6
2024-12-25 16:22 UT 17 59 20.4 -53 39 39 37.253 36.413 30.5 0.8 188 34.6
2024-12-26 00:00 UT 17 59 24.1 -53 39 39 37.258 36.419 30.5 0.8 189 34.6
2024-12-27 00:00 UT 17 59 35.6 -53 39 41 37.276 36.438 30.7 0.8 191 34.6
2024-12-28 00:00 UT 17 59 47.2 -53 39 43 37.294 36.457 30.8 0.8 193 34.6
2024-12-29 00:00 UT 17 59 58.6 -53 39 47 37.311 36.476 31.0 0.8 194 34.6
2024-12-30 00:00 UT 18 00 10.1 -53 39 51 37.328 36.495 31.3 0.8 196 34.6
2024-12-31 00:00 UT 18 00 21.5 -53 39 55 37.344 36.514 31.5 0.8 198 34.6
2025-01-01 00:00 UT 18 00 32.9 -53 40 01 37.361 36.533 31.8 0.8 200 34.6
2025-01-02 00:00 UT 18 00 44.2 -53 40 07 37.377 36.552 32.1 0.8 202 34.6
2025-01-03 00:00 UT 18 00 55.5 -53 40 14 37.393 36.571 32.4 0.8 203 34.6
2025-01-04 00:00 UT 18 01 06.8 -53 40 22 37.409 36.590 32.8 0.8 205 34.6
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.