| Parameter |
Value |
| Designation |
P/2023 B1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-05-02T06:19:36.007680Z |
| Orbit solution date (soln_date, UTC) |
2026-05-05T09:12:15Z |
| Obs used |
511 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
10.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-01-21T11:25:35.040000Z |
| Discovery magnitude (MPC) |
17.72 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-03-13.0000000 |
| e |
0.12909924 |
| q (au) |
6.140433 |
| a (au) |
7.050669 |
| i (deg) |
14.588220 |
| Ω (om, deg) |
78.583922 |
| ω (w, deg) |
81.602452 |
| M (ma, deg) |
357.353863 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.413 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.413 |
| n |
2.000 |
| gf |
0.988 |
| gb |
-0.825 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
15:11:15.58 |
-11:54:47.9 |
HIP 74311 |
26.54 |
| 2026-07-29 12:00 |
15:11:17.77 |
-11:55:48.7 |
HIP 74311 |
27.54 |
| 2026-07-30 00:00 |
15:11:20.09 |
-11:56:50.0 |
HIP 74311 |
28.55 |
| 2026-07-30 12:00 |
15:11:22.56 |
-11:57:51.8 |
HIP 74311 |
29.58 |
| 2026-07-31 00:00 |
15:11:25.16 |
-11:58:54.1 |
HIP 74430 |
30.56 |
| 2026-07-31 12:00 |
15:11:27.90 |
-11:59:56.8 |
HIP 74430 |
29.32 |
| 2026-08-01 00:00 |
15:11:30.79 |
-12:01:00.1 |
HIP 74430 |
28.05 |
| 2026-08-01 12:00 |
15:11:33.81 |
-12:02:03.8 |
HIP 74430 |
26.76 |
| 2026-08-02 00:00 |
15:11:36.97 |
-12:03:07.9 |
HIP 74430 |
25.44 |
| 2026-08-02 12:00 |
15:11:40.26 |
-12:04:12.6 |
HIP 74430 |
24.10 |
| 2026-08-03 00:00 |
15:11:43.70 |
-12:05:17.7 |
HIP 74430 |
22.72 |
| 2026-08-03 12:00 |
15:11:47.27 |
-12:06:23.2 |
HIP 74430 |
21.33 |
| 2026-08-04 00:00 |
15:11:50.98 |
-12:07:29.3 |
HIP 74430 |
19.90 |
| 2026-08-04 12:00 |
15:11:54.83 |
-12:08:35.7 |
HIP 74430 |
18.45 |
| 2026-08-05 00:00 |
15:11:58.81 |
-12:09:42.7 |
HIP 74430 |
16.97 |
| 2026-08-05 12:00 |
15:12:02.93 |
-12:10:50.1 |
HIP 74430 |
15.47 |
| 2026-08-06 00:00 |
15:12:07.19 |
-12:11:57.9 |
HIP 74430 |
13.94 |
| 2026-08-06 12:00 |
15:12:11.58 |
-12:13:06.2 |
HIP 74430 |
12.39 |
| 2026-08-07 00:00 |
15:12:16.11 |
-12:14:14.9 |
HIP 74430 |
10.82 |
| 2026-08-07 12:00 |
15:12:20.78 |
-12:15:24.0 |
HIP 74430 |
9.23 |
| 2026-08-08 00:00 |
15:12:25.58 |
-12:16:33.6 |
HIP 74430 |
7.64 |
| 2026-08-08 12:00 |
15:12:30.51 |
-12:17:43.6 |
HIP 74430 |
6.05 |
| 2026-08-09 00:00 |
15:12:35.59 |
-12:18:54.1 |
HIP 74430 |
4.51 |
| 2026-08-09 12:00 |
15:12:40.79 |
-12:20:05.0 |
HIP 74430 |
3.14 |
| 2026-08-10 00:00 |
15:12:46.14 |
-12:21:16.3 |
HIP 74430 |
2.34 |
| 2026-08-10 12:00 |
15:12:51.61 |
-12:22:28.0 |
HIP 74430 |
2.74 |
| 2026-08-11 00:00 |
15:12:57.22 |
-12:23:40.1 |
HIP 74430 |
4.03 |
| 2026-08-11 12:00 |
15:13:02.97 |
-12:24:52.7 |
HIP 74430 |
5.65 |
| 2026-08-12 00:00 |
15:13:08.84 |
-12:26:05.6 |
HIP 74430 |
7.42 |
| 2026-08-12 12:00 |
15:13:14.85 |
-12:27:19.0 |
HIP 74533 |
9.08 |
| 2026-08-13 00:00 |
15:13:21.00 |
-12:28:32.7 |
HIP 74533 |
8.58 |
| 2026-08-13 12:00 |
15:13:27.27 |
-12:29:46.9 |
HIP 74533 |
8.49 |
| 2026-08-14 00:00 |
15:13:33.68 |
-12:31:01.4 |
HIP 74533 |
8.84 |
| 2026-08-14 12:00 |
15:13:40.22 |
-12:32:16.3 |
HIP 74533 |
9.61 |
| 2026-08-15 00:00 |
15:13:46.89 |
-12:33:31.7 |
HIP 74533 |
10.71 |
| 2026-08-15 12:00 |
15:13:53.69 |
-12:34:47.4 |
HIP 74533 |
12.08 |
| 2026-08-16 00:00 |
15:14:00.62 |
-12:36:03.4 |
HIP 74533 |
13.64 |
| 2026-08-16 12:00 |
15:14:07.68 |
-12:37:19.9 |
HIP 74533 |
15.36 |
| 2026-08-17 00:00 |
15:14:14.87 |
-12:38:36.7 |
HIP 74533 |
17.18 |
| 2026-08-17 12:00 |
15:14:22.18 |
-12:39:53.8 |
HIP 74533 |
19.10 |
| 2026-08-18 00:00 |
15:14:29.63 |
-12:41:11.4 |
HIP 74533 |
21.10 |
| 2026-08-18 12:00 |
15:14:37.20 |
-12:42:29.2 |
HIP 74533 |
23.16 |
| 2026-08-19 00:00 |
15:14:44.90 |
-12:43:47.5 |
HIP 74533 |
25.27 |