P/2026 B1 (PANSTARRS)
| Parameter |
Value |
| Designation |
P/2026 B1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-09-11T20:41:00.772800Z |
| Orbit solution date (soln_date, UTC) |
2026-01-28T13:12:01Z |
| Obs used |
85 |
| NEO |
- |
| M1 |
17.900 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-12-16.0000000 |
| e |
0.32753988 |
| q (au) |
2.438137 |
| a (au) |
3.625697 |
| i (deg) |
4.016915 |
| Ω (om, deg) |
105.539703 |
| ω (w, deg) |
73.275558 |
| M (ma, deg) |
170.050920 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
08:18:24.64 |
+21:58:08.2 |
HIP 40696 |
15.09 |
| 2026-02-03 12:00 |
08:18:01.11 |
+22:00:03.3 |
HIP 40696 |
14.40 |
| 2026-02-04 00:00 |
08:17:37.70 |
+22:01:57.5 |
HIP 40565 |
11.68 |
| 2026-02-04 12:00 |
08:17:14.41 |
+22:03:50.6 |
HIP 40565 |
9.58 |
| 2026-02-05 00:00 |
08:16:51.26 |
+22:05:42.8 |
HIP 40565 |
10.59 |
| 2026-02-05 12:00 |
08:16:28.24 |
+22:07:33.9 |
HIP 40565 |
14.01 |
| 2026-02-06 00:00 |
08:16:05.37 |
+22:09:23.9 |
HIP 40565 |
18.52 |
| 2026-02-06 12:00 |
08:15:42.66 |
+22:11:12.9 |
HIP 40565 |
23.46 |
| 2026-02-07 00:00 |
08:15:20.11 |
+22:13:00.8 |
HIP 40306 |
21.05 |
| 2026-02-07 12:00 |
08:14:57.72 |
+22:14:47.5 |
HIP 40306 |
15.65 |
| 2026-02-08 00:00 |
08:14:35.52 |
+22:16:33.2 |
HIP 40306 |
10.39 |
| 2026-02-08 12:00 |
08:14:13.50 |
+22:18:17.6 |
HIP 40306 |
5.50 |
| 2026-02-09 00:00 |
08:13:51.67 |
+22:20:00.9 |
HIP 40306 |
3.24 |
| 2026-02-09 12:00 |
08:13:30.04 |
+22:21:43.0 |
HIP 40306 |
6.85 |
| 2026-02-10 00:00 |
08:13:08.61 |
+22:23:23.8 |
HIP 40216 |
4.52 |
| 2026-02-10 12:00 |
08:12:47.40 |
+22:25:03.4 |
HIP 40216 |
2.31 |
| 2026-02-11 00:00 |
08:12:26.41 |
+22:26:41.8 |
HIP 40216 |
6.57 |
| 2026-02-11 12:00 |
08:12:05.65 |
+22:28:18.8 |
HIP 40216 |
11.49 |
| 2026-02-12 00:00 |
08:11:45.12 |
+22:29:54.6 |
HIP 40216 |
16.44 |
| 2026-02-12 12:00 |
08:11:24.83 |
+22:31:29.1 |
HIP 40216 |
21.36 |
| 2026-02-13 00:00 |
08:11:04.79 |
+22:33:02.3 |
HIP 40216 |
26.22 |
| 2026-02-13 12:00 |
08:10:45.01 |
+22:34:34.1 |
HIP 40216 |
31.02 |
| 2026-02-14 00:00 |
08:10:25.49 |
+22:36:04.5 |
HIP 40216 |
35.77 |
| 2026-02-14 12:00 |
08:10:06.24 |
+22:37:33.6 |
HIP 39788 |
32.63 |
| 2026-02-15 00:00 |
08:09:47.26 |
+22:39:01.3 |
HIP 39788 |
28.01 |
| 2026-02-15 12:00 |
08:09:28.57 |
+22:40:27.7 |
HIP 39788 |
23.47 |
| 2026-02-16 00:00 |
08:09:10.16 |
+22:41:52.6 |
HIP 39788 |
19.00 |
| 2026-02-16 12:00 |
08:08:52.04 |
+22:43:16.1 |
HIP 39788 |
14.60 |
| 2026-02-17 00:00 |
08:08:34.23 |
+22:44:38.1 |
HIP 39788 |
10.29 |
| 2026-02-17 12:00 |
08:08:16.72 |
+22:45:58.7 |
HIP 39788 |
6.06 |
| 2026-02-18 00:00 |
08:07:59.52 |
+22:47:17.9 |
HIP 39788 |
2.05 |
| 2026-02-18 12:00 |
08:07:42.64 |
+22:48:35.6 |
HIP 39788 |
2.48 |
| 2026-02-19 00:00 |
08:07:26.08 |
+22:49:51.8 |
HIP 39788 |
6.39 |
| 2026-02-19 12:00 |
08:07:09.84 |
+22:51:06.5 |
HIP 39705 |
5.55 |
| 2026-02-20 00:00 |
08:06:53.95 |
+22:52:19.8 |
HIP 39705 |
5.83 |
| 2026-02-20 12:00 |
08:06:38.38 |
+22:53:31.6 |
HIP 39705 |
8.12 |
| 2026-02-21 00:00 |
08:06:23.17 |
+22:54:41.8 |
HIP 39705 |
11.17 |
| 2026-02-21 12:00 |
08:06:08.30 |
+22:55:50.6 |
HIP 39705 |
14.45 |
| 2026-02-22 00:00 |
08:05:53.78 |
+22:56:57.8 |
HIP 39705 |
17.78 |
| 2026-02-22 12:00 |
08:05:39.61 |
+22:58:03.5 |
HIP 39705 |
21.09 |
| 2026-02-23 00:00 |
08:05:25.81 |
+22:59:07.7 |
HIP 39659 |
24.24 |
| 2026-02-23 12:00 |
08:05:12.37 |
+23:00:10.4 |
HIP 39659 |
26.78 |
| 2026-02-24 00:00 |
08:04:59.30 |
+23:01:11.5 |
HIP 39465 |
27.00 |