| 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 · 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) |
| 2026-03-26 00:00 |
18:51:07.48 |
-14:06:43.1 |
HIP 92355 |
30.71 |
| 2026-03-26 12:00 |
18:51:12.35 |
-14:06:10.2 |
HIP 92355 |
32.00 |
| 2026-03-27 00:00 |
18:51:17.11 |
-14:05:37.4 |
HIP 92456 |
33.22 |
| 2026-03-27 12:00 |
18:51:21.75 |
-14:05:04.6 |
HIP 92456 |
33.10 |
| 2026-03-28 00:00 |
18:51:26.27 |
-14:04:32.0 |
HIP 92456 |
33.03 |
| 2026-03-28 12:00 |
18:51:30.67 |
-14:03:59.4 |
HIP 92456 |
32.99 |
| 2026-03-29 00:00 |
18:51:34.96 |
-14:03:26.8 |
HIP 92456 |
32.97 |
| 2026-03-29 12:00 |
18:51:39.12 |
-14:02:54.4 |
HIP 92456 |
32.99 |
| 2026-03-30 00:00 |
18:51:43.16 |
-14:02:22.0 |
HIP 92456 |
33.03 |
| 2026-03-30 12:00 |
18:51:47.08 |
-14:01:49.8 |
HIP 92456 |
33.10 |
| 2026-03-31 00:00 |
18:51:50.88 |
-14:01:17.6 |
HIP 92456 |
33.19 |
| 2026-03-31 12:00 |
18:51:54.57 |
-14:00:45.5 |
HIP 92456 |
33.29 |
| 2026-04-01 00:00 |
18:51:58.13 |
-14:00:13.5 |
HIP 92456 |
33.41 |
| 2026-04-01 12:00 |
18:52:01.56 |
-13:59:41.6 |
HIP 92456 |
33.54 |
| 2026-04-02 00:00 |
18:52:04.88 |
-13:59:09.9 |
HIP 92456 |
33.68 |
| 2026-04-02 12:00 |
18:52:08.07 |
-13:58:38.2 |
HIP 92456 |
33.83 |
| 2026-04-03 00:00 |
18:52:11.15 |
-13:58:06.6 |
HIP 92456 |
33.98 |
| 2026-04-03 12:00 |
18:52:14.10 |
-13:57:35.1 |
HIP 92456 |
34.14 |
| 2026-04-04 00:00 |
18:52:16.92 |
-13:57:03.8 |
HIP 92763 |
33.84 |
| 2026-04-04 12:00 |
18:52:19.63 |
-13:56:32.6 |
HIP 92763 |
33.00 |
| 2026-04-05 00:00 |
18:52:22.21 |
-13:56:01.5 |
HIP 92763 |
32.19 |
| 2026-04-05 12:00 |
18:52:24.67 |
-13:55:30.5 |
HIP 92763 |
31.41 |
| 2026-04-06 00:00 |
18:52:27.00 |
-13:54:59.6 |
HIP 92763 |
30.65 |
| 2026-04-06 12:00 |
18:52:29.21 |
-13:54:28.9 |
HIP 92763 |
29.92 |
| 2026-04-07 00:00 |
18:52:31.30 |
-13:53:58.3 |
HIP 92763 |
29.21 |
| 2026-04-07 12:00 |
18:52:33.26 |
-13:53:27.8 |
HIP 92763 |
28.54 |
| 2026-04-08 00:00 |
18:52:35.09 |
-13:52:57.4 |
HIP 92763 |
27.88 |
| 2026-04-08 12:00 |
18:52:36.80 |
-13:52:27.2 |
HIP 92763 |
27.26 |
| 2026-04-09 00:00 |
18:52:38.39 |
-13:51:57.2 |
HIP 92763 |
26.67 |
| 2026-04-09 12:00 |
18:52:39.85 |
-13:51:27.3 |
HIP 92763 |
26.10 |
| 2026-04-10 00:00 |
18:52:41.18 |
-13:50:57.5 |
HIP 92763 |
25.56 |
| 2026-04-10 12:00 |
18:52:42.39 |
-13:50:27.9 |
HIP 92763 |
25.06 |
| 2026-04-11 00:00 |
18:52:43.47 |
-13:49:58.5 |
HIP 92763 |
24.58 |
| 2026-04-11 12:00 |
18:52:44.43 |
-13:49:29.2 |
HIP 92763 |
24.14 |
| 2026-04-12 00:00 |
18:52:45.26 |
-13:49:00.0 |
HIP 92763 |
23.73 |
| 2026-04-12 12:00 |
18:52:45.96 |
-13:48:31.1 |
HIP 92763 |
23.35 |
| 2026-04-13 00:00 |
18:52:46.53 |
-13:48:02.2 |
HIP 92763 |
23.00 |
| 2026-04-13 12:00 |
18:52:46.98 |
-13:47:33.6 |
HIP 92763 |
22.69 |
| 2026-04-14 00:00 |
18:52:47.30 |
-13:47:05.1 |
HIP 92763 |
22.42 |
| 2026-04-14 12:00 |
18:52:47.49 |
-13:46:36.9 |
HIP 92763 |
22.18 |
| 2026-04-15 00:00 |
18:52:47.56 |
-13:46:08.8 |
HIP 92763 |
21.98 |
| 2026-04-15 12:00 |
18:52:47.50 |
-13:45:40.8 |
HIP 92763 |
21.81 |
| 2026-04-16 00:00 |
18:52:47.31 |
-13:45:13.1 |
HIP 92763 |
21.69 |