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 | 27 Jul 2024 | 33.9 | 33.532 AU | 32.825 AU | 17h49m | -55°21' | 133.2° | 1.3° | 55° |
2I/Borisov- 2024-07-27
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 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
2024-07-27 00:00 UT 17 49 18.8 -55 22 04 32.816 33.525 133.4 1.3 55 33.9
2024-07-27 08:10 UT 17 49 15.8 -55 21 49 32.825 33.532 133.2 1.3 55 33.9
2024-07-28 00:00 UT 17 49 10.1 -55 21 22 32.843 33.544 132.7 1.3 56 33.9
2024-07-29 00:00 UT 17 49 01.6 -55 20 39 32.871 33.563 132.1 1.3 57 33.9
2024-07-30 00:00 UT 17 48 53.2 -55 19 56 32.899 33.582 131.4 1.3 58 34.0
2024-07-31 00:00 UT 17 48 44.9 -55 19 12 32.927 33.602 130.7 1.3 59 34.0
2024-08-01 00:00 UT 17 48 36.8 -55 18 27 32.956 33.621 130.0 1.3 60 34.0
2024-08-02 00:00 UT 17 48 28.9 -55 17 42 32.984 33.640 129.3 1.3 61 34.0
2024-08-03 00:00 UT 17 48 21.1 -55 16 56 33.013 33.659 128.6 1.4 62 34.0
2024-08-04 00:00 UT 17 48 13.5 -55 16 09 33.042 33.678 127.8 1.4 63 34.0
2024-08-05 00:00 UT 17 48 06.1 -55 15 22 33.071 33.697 127.1 1.4 63 34.0
2024-08-06 00:00 UT 17 47 58.8 -55 14 34 33.101 33.716 126.4 1.4 64 34.0
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.