| Parameter |
Value |
| Designation |
P/2022 B1 (Wierzchos) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-02-25T08:09:18.426240Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:13:41Z |
| Obs used |
77 |
| NEO |
- |
| M1 |
9.800 |
| K1 |
34.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-01-25T05:00:25.027200Z |
| Discovery magnitude (MPC) |
19.82 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-01-17.0000000 |
| e |
0.65283630 |
| q (au) |
1.896707 |
| a (au) |
5.463438 |
| i (deg) |
10.990904 |
| Ω (om, deg) |
148.849791 |
| ω (w, deg) |
325.482098 |
| M (ma, deg) |
356.963752 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.533 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.533 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2021-10-30 |
2022-02-09 |
+18.7304 |
-5.466 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
18:13:00.02 |
-14:55:07.7 |
HIP 89263 |
16.44 |
| 2026-09-20 12:00 |
18:13:01.90 |
-14:55:43.0 |
HIP 89263 |
15.89 |
| 2026-09-21 00:00 |
18:13:03.91 |
-14:56:18.2 |
HIP 89263 |
15.35 |
| 2026-09-21 12:00 |
18:13:06.03 |
-14:56:53.3 |
HIP 89263 |
14.85 |
| 2026-09-22 00:00 |
18:13:08.27 |
-14:57:28.3 |
HIP 89263 |
14.37 |
| 2026-09-22 12:00 |
18:13:10.64 |
-14:58:03.2 |
HIP 89263 |
13.93 |
| 2026-09-23 00:00 |
18:13:13.12 |
-14:58:38.0 |
HIP 89263 |
13.54 |
| 2026-09-23 12:00 |
18:13:15.72 |
-14:59:12.7 |
HIP 89263 |
13.20 |
| 2026-09-24 00:00 |
18:13:18.43 |
-14:59:47.3 |
HIP 89263 |
12.93 |
| 2026-09-24 12:00 |
18:13:21.27 |
-15:00:21.8 |
HIP 89263 |
12.72 |
| 2026-09-25 00:00 |
18:13:24.22 |
-15:00:56.2 |
HIP 89263 |
12.59 |
| 2026-09-25 12:00 |
18:13:27.29 |
-15:01:30.5 |
HIP 89263 |
12.54 |
| 2026-09-26 00:00 |
18:13:30.48 |
-15:02:04.6 |
HIP 89263 |
12.58 |
| 2026-09-26 12:00 |
18:13:33.78 |
-15:02:38.7 |
HIP 89263 |
12.71 |
| 2026-09-27 00:00 |
18:13:37.20 |
-15:03:12.6 |
HIP 89263 |
12.95 |
| 2026-09-27 12:00 |
18:13:40.74 |
-15:03:46.4 |
HIP 89263 |
13.27 |
| 2026-09-28 00:00 |
18:13:44.39 |
-15:04:20.1 |
HIP 89263 |
13.69 |
| 2026-09-28 12:00 |
18:13:48.15 |
-15:04:53.7 |
HIP 89263 |
14.20 |
| 2026-09-29 00:00 |
18:13:52.03 |
-15:05:27.1 |
HIP 89263 |
14.80 |
| 2026-09-29 12:00 |
18:13:56.03 |
-15:06:00.4 |
HIP 89263 |
15.47 |
| 2026-09-30 00:00 |
18:14:00.13 |
-15:06:33.6 |
HIP 89263 |
16.22 |
| 2026-09-30 12:00 |
18:14:04.36 |
-15:07:06.7 |
HIP 89263 |
17.05 |
| 2026-10-01 00:00 |
18:14:08.69 |
-15:07:39.6 |
HIP 89263 |
17.93 |
| 2026-10-01 12:00 |
18:14:13.14 |
-15:08:12.4 |
HIP 89422 |
18.36 |
| 2026-10-02 00:00 |
18:14:17.70 |
-15:08:45.0 |
HIP 89422 |
17.28 |
| 2026-10-02 12:00 |
18:14:22.38 |
-15:09:17.5 |
HIP 89422 |
16.22 |
| 2026-10-03 00:00 |
18:14:27.17 |
-15:09:49.9 |
HIP 89422 |
15.17 |
| 2026-10-03 12:00 |
18:14:32.06 |
-15:10:22.1 |
HIP 89422 |
14.14 |
| 2026-10-04 00:00 |
18:14:37.08 |
-15:10:54.2 |
HIP 89422 |
13.16 |
| 2026-10-04 12:00 |
18:14:42.20 |
-15:11:26.2 |
HIP 89422 |
12.24 |
| 2026-10-05 00:00 |
18:14:47.43 |
-15:11:58.0 |
HIP 89422 |
11.39 |
| 2026-10-05 12:00 |
18:14:52.78 |
-15:12:29.6 |
HIP 89422 |
10.66 |
| 2026-10-06 00:00 |
18:14:58.23 |
-15:13:01.1 |
HIP 89422 |
10.07 |
| 2026-10-06 12:00 |
18:15:03.79 |
-15:13:32.4 |
HIP 89422 |
9.65 |
| 2026-10-07 00:00 |
18:15:09.47 |
-15:14:03.6 |
HIP 89422 |
9.46 |
| 2026-10-07 12:00 |
18:15:15.25 |
-15:14:34.6 |
HIP 89422 |
9.50 |
| 2026-10-08 00:00 |
18:15:21.14 |
-15:15:05.4 |
HIP 89422 |
9.78 |
| 2026-10-08 12:00 |
18:15:27.14 |
-15:15:36.1 |
HIP 89422 |
10.31 |
| 2026-10-09 00:00 |
18:15:33.25 |
-15:16:06.6 |
HIP 89422 |
11.04 |
| 2026-10-09 12:00 |
18:15:39.47 |
-15:16:36.9 |
HIP 89422 |
11.96 |
| 2026-10-10 00:00 |
18:15:45.79 |
-15:17:07.1 |
HIP 89422 |
13.03 |
| 2026-10-10 12:00 |
18:15:52.22 |
-15:17:37.1 |
HIP 89422 |
14.22 |
| 2026-10-11 00:00 |
18:15:58.75 |
-15:18:06.9 |
HIP 89422 |
15.52 |