| Parameter |
Value |
| Designation |
C/2023 Q2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-06-24T02:17:12.935040Z |
| Orbit solution date (soln_date, UTC) |
2024-07-07T00:42:12Z |
| Obs used |
136 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-08-23T06:04:38.208000Z |
| Discovery magnitude (MPC) |
21.14 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-10-03.0000000 |
| e |
0.99053833 |
| q (au) |
3.209446 |
| a (au) |
339.205025 |
| i (deg) |
104.054511 |
| Ω (om, deg) |
92.682369 |
| ω (w, deg) |
171.725609 |
| M (ma, deg) |
359.958177 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.694 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.694 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
07:08:16.74 |
-73:38:19.3 |
HIP 33813 |
30.46 |
| 2026-03-26 12:00 |
07:08:02.22 |
-73:31:53.2 |
HIP 33813 |
29.11 |
| 2026-03-27 00:00 |
07:07:48.46 |
-73:25:26.9 |
HIP 33813 |
29.23 |
| 2026-03-27 12:00 |
07:07:35.43 |
-73:19:00.5 |
HIP 33813 |
30.80 |
| 2026-03-28 00:00 |
07:07:23.12 |
-73:12:33.8 |
HIP 33795 |
28.87 |
| 2026-03-28 12:00 |
07:07:11.52 |
-73:06:07.1 |
HIP 33795 |
26.90 |
| 2026-03-29 00:00 |
07:07:00.60 |
-72:59:40.2 |
HIP 34715 |
23.88 |
| 2026-03-29 12:00 |
07:06:50.37 |
-72:53:13.3 |
HIP 34715 |
21.41 |
| 2026-03-30 00:00 |
07:06:40.81 |
-72:46:46.3 |
HIP 34715 |
20.71 |
| 2026-03-30 12:00 |
07:06:31.89 |
-72:40:19.3 |
HIP 34715 |
21.96 |
| 2026-03-31 00:00 |
07:06:23.62 |
-72:33:52.4 |
HIP 34643 |
22.85 |
| 2026-03-31 12:00 |
07:06:15.98 |
-72:27:25.5 |
HIP 34643 |
20.39 |
| 2026-04-01 00:00 |
07:06:08.96 |
-72:20:58.6 |
HIP 34643 |
19.79 |
| 2026-04-01 12:00 |
07:06:02.55 |
-72:14:31.9 |
HIP 34035 |
18.30 |
| 2026-04-02 00:00 |
07:05:56.73 |
-72:08:05.3 |
HIP 34035 |
13.41 |
| 2026-04-02 12:00 |
07:05:51.49 |
-72:01:38.8 |
HIP 34035 |
10.43 |
| 2026-04-03 00:00 |
07:05:46.83 |
-71:55:12.5 |
HIP 34035 |
11.03 |
| 2026-04-03 12:00 |
07:05:42.74 |
-71:48:46.4 |
HIP 34035 |
14.79 |
| 2026-04-04 00:00 |
07:05:39.20 |
-71:42:20.6 |
HIP 34035 |
19.98 |
| 2026-04-04 12:00 |
07:05:36.20 |
-71:35:55.0 |
HIP 34212 |
19.54 |
| 2026-04-05 00:00 |
07:05:33.73 |
-71:29:29.6 |
HIP 34212 |
13.12 |
| 2026-04-05 12:00 |
07:05:31.79 |
-71:23:04.6 |
HIP 34212 |
6.72 |
| 2026-04-06 00:00 |
07:05:30.37 |
-71:16:39.9 |
HIP 34212 |
0.62 |
| 2026-04-06 12:00 |
07:05:29.45 |
-71:10:15.6 |
HIP 34212 |
6.15 |
| 2026-04-07 00:00 |
07:05:29.03 |
-71:03:51.6 |
HIP 34212 |
12.53 |
| 2026-04-07 12:00 |
07:05:29.10 |
-70:57:28.0 |
HIP 34212 |
18.92 |
| 2026-04-08 00:00 |
07:05:29.65 |
-70:51:04.9 |
HIP 33990 |
21.87 |
| 2026-04-08 12:00 |
07:05:30.66 |
-70:44:42.2 |
HIP 33990 |
16.86 |
| 2026-04-09 00:00 |
07:05:32.15 |
-70:38:19.9 |
HIP 33990 |
13.16 |
| 2026-04-09 12:00 |
07:05:34.08 |
-70:31:58.1 |
HIP 33990 |
11.99 |
| 2026-04-10 00:00 |
07:05:36.47 |
-70:25:36.9 |
HIP 33990 |
14.02 |
| 2026-04-10 12:00 |
07:05:39.29 |
-70:19:16.2 |
HIP 33990 |
18.19 |
| 2026-04-11 00:00 |
07:05:42.55 |
-70:12:56.0 |
HIP 34473 |
22.67 |
| 2026-04-11 12:00 |
07:05:46.23 |
-70:06:36.4 |
HIP 34473 |
27.57 |
| 2026-04-12 00:00 |
07:05:50.32 |
-70:00:17.5 |
HIP 34706 |
28.68 |
| 2026-04-12 12:00 |
07:05:54.83 |
-69:53:59.1 |
HIP 34706 |
30.53 |
| 2026-04-13 00:00 |
07:05:59.74 |
-69:47:41.4 |
HIP 33680 |
31.98 |
| 2026-04-13 12:00 |
07:06:05.04 |
-69:41:24.3 |
HIP 33680 |
33.29 |
| 2026-04-14 00:00 |
07:06:10.74 |
-69:35:08.0 |
HIP 33680 |
35.71 |
| 2026-04-14 12:00 |
07:06:16.82 |
-69:28:52.3 |
HIP 34270 |
38.62 |
| 2026-04-15 00:00 |
07:06:23.27 |
-69:22:37.3 |
HIP 34270 |
32.38 |
| 2026-04-15 12:00 |
07:06:30.09 |
-69:16:23.2 |
HIP 34270 |
26.17 |
| 2026-04-16 00:00 |
07:06:37.27 |
-69:10:09.7 |
HIP 34270 |
20.01 |