C/2023 P1 (Nishimura) | astro.vanbuitenen.nl (2024)


C/2023 P1 (Nishimura)
ephemeris date magn radius delta ra dec elong phase PA
Nearest approach12 Sep 20233.10.291 AU0.838 AU11h11m+19°03'14.9°117.6°352°
Perihelion17 Sep 20232.40.225 AU0.927 AU12h24m+07°24'12.5°104.0°67°
Today9 Jul 202418.74.626 AU5.168 AU08h48m-25°23'52.8°10.1°153°

Please be aware that cometary behaviour is difficult to predict by nature. Predictions on this page are based on standard models and the latest observations available to me, and will gradually improve with time. The ability of comets to either disappoint or pleasantly surprise us, is one of many things that make them so interesting.

C/2023 P1 (Nishimura)- 2024-07-09

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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/2023 P1 (Nishimura) are:

 e (Eccentricity) : 0.9960490 q (Perihelion distance) : 0.2249680 i (Inclination) : 132.47700 Ω (Longitude of ascending node) : 66.84110 ω (Argument of perihelion) : 116.29070 L (Longitude of perihelion) : 120.65280 B (Latitude of perihelion) : 41.39567 T (Time of perihelion passage) : 2460205.14560 P (Orbital period in years) : 429.66 Epoch : 2024 Jul 07 Reference : MPEC 2024-MB8 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 (9.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 8.82 + 5 log[∆] + 9.48 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 0.30. (See Marcus 2007)

C/2023 P1 (Nishimura) | astro.vanbuitenen.nl (1)


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.


C/2023 P1 (Nishimura) | astro.vanbuitenen.nl (2)

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.

C/2023 P1 (Nishimura) | astro.vanbuitenen.nl (3)


The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.

C/2023 P1 (Nishimura) | astro.vanbuitenen.nl (4)


A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.

C/2023 P1 (Nishimura) | astro.vanbuitenen.nl (5)

Ephemerides:

Date Time RA (2000) DEC (2000) delta radius elong phase PA magn2024-07-09 00:00 UT 08 48 13.2 -25 23 20 5.163 4.623 53.0 10.1 152 18.7 2024-07-09 06:58 UT 08 48 25.0 -25 23 09 5.168 4.626 52.8 10.1 153 18.7 2024-07-10 00:00 UT 08 48 53.9 -25 22 45 5.181 4.633 52.5 10.0 153 18.7 2024-07-11 00:00 UT 08 49 34.6 -25 22 18 5.199 4.644 52.0 9.9 154 18.7 2024-07-12 00:00 UT 08 50 15.3 -25 21 58 5.218 4.655 51.6 9.9 155 18.7 2024-07-13 00:00 UT 08 50 56.0 -25 21 46 5.236 4.666 51.1 9.8 156 18.8 2024-07-14 00:00 UT 08 51 36.6 -25 21 41 5.254 4.676 50.7 9.7 156 18.8 2024-07-15 00:00 UT 08 52 17.3 -25 21 43 5.271 4.687 50.2 9.6 157 18.8 2024-07-16 00:00 UT 08 52 57.8 -25 21 53 5.289 4.698 49.8 9.5 158 18.8 2024-07-17 00:00 UT 08 53 38.4 -25 22 09 5.306 4.709 49.4 9.4 159 18.8 2024-07-18 00:00 UT 08 54 18.9 -25 22 33 5.324 4.719 49.0 9.3 160 18.8 2024-07-19 00:00 UT 08 54 59.4 -25 23 03 5.341 4.730 48.5 9.3 161 18.9 

 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.

C/2023 P1 (Nishimura) | astro.vanbuitenen.nl (2024)
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