| 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) |
| 2026-06-01 00:00 |
18:43:57.62 |
-13:20:58.8 |
HIP 91929 |
10.58 |
| 2026-06-01 12:00 |
18:43:47.09 |
-13:20:57.3 |
HIP 91929 |
12.35 |
| 2026-06-02 00:00 |
18:43:36.48 |
-13:20:56.1 |
HIP 91929 |
14.37 |
| 2026-06-02 12:00 |
18:43:25.80 |
-13:20:55.3 |
HIP 91929 |
16.58 |
| 2026-06-03 00:00 |
18:43:15.04 |
-13:20:54.8 |
HIP 91929 |
18.90 |
| 2026-06-03 12:00 |
18:43:04.21 |
-13:20:54.6 |
HIP 91929 |
21.30 |
| 2026-06-04 00:00 |
18:42:53.31 |
-13:20:54.8 |
HIP 91929 |
23.78 |
| 2026-06-04 12:00 |
18:42:42.34 |
-13:20:55.3 |
HIP 91608 |
25.59 |
| 2026-06-05 00:00 |
18:42:31.30 |
-13:20:56.2 |
HIP 91608 |
22.92 |
| 2026-06-05 12:00 |
18:42:20.20 |
-13:20:57.4 |
HIP 91608 |
20.22 |
| 2026-06-06 00:00 |
18:42:09.02 |
-13:20:58.9 |
HIP 91608 |
17.51 |
| 2026-06-06 12:00 |
18:41:57.78 |
-13:21:00.7 |
HIP 91608 |
14.79 |
| 2026-06-07 00:00 |
18:41:46.48 |
-13:21:02.9 |
HIP 91608 |
12.06 |
| 2026-06-07 12:00 |
18:41:35.11 |
-13:21:05.4 |
HIP 91608 |
9.32 |
| 2026-06-08 00:00 |
18:41:23.69 |
-13:21:08.3 |
HIP 91608 |
6.58 |
| 2026-06-08 12:00 |
18:41:12.20 |
-13:21:11.5 |
HIP 91608 |
3.90 |
| 2026-06-09 00:00 |
18:41:00.65 |
-13:21:15.0 |
HIP 91608 |
1.64 |
| 2026-06-09 12:00 |
18:40:49.04 |
-13:21:18.9 |
HIP 91597 |
1.35 |
| 2026-06-10 00:00 |
18:40:37.38 |
-13:21:23.1 |
HIP 91597 |
2.76 |
| 2026-06-10 12:00 |
18:40:25.66 |
-13:21:27.7 |
HIP 91597 |
5.45 |
| 2026-06-11 00:00 |
18:40:13.89 |
-13:21:32.5 |
HIP 91597 |
8.26 |
| 2026-06-11 12:00 |
18:40:02.06 |
-13:21:37.7 |
HIP 91597 |
11.12 |
| 2026-06-12 00:00 |
18:39:50.18 |
-13:21:43.3 |
HIP 91597 |
13.99 |
| 2026-06-12 12:00 |
18:39:38.26 |
-13:21:49.2 |
HIP 91597 |
16.89 |
| 2026-06-13 00:00 |
18:39:26.28 |
-13:21:55.4 |
HIP 91597 |
19.80 |
| 2026-06-13 12:00 |
18:39:14.26 |
-13:22:02.0 |
HIP 91349 |
20.20 |
| 2026-06-14 00:00 |
18:39:02.19 |
-13:22:08.9 |
HIP 91349 |
17.40 |
| 2026-06-14 12:00 |
18:38:50.08 |
-13:22:16.1 |
HIP 91349 |
14.64 |
| 2026-06-15 00:00 |
18:38:37.92 |
-13:22:23.6 |
HIP 91349 |
11.95 |
| 2026-06-15 12:00 |
18:38:25.73 |
-13:22:31.5 |
HIP 91349 |
9.42 |
| 2026-06-16 00:00 |
18:38:13.49 |
-13:22:39.7 |
HIP 91349 |
7.21 |
| 2026-06-16 12:00 |
18:38:01.22 |
-13:22:48.3 |
HIP 91349 |
5.75 |
| 2026-06-17 00:00 |
18:37:48.91 |
-13:22:57.2 |
HIP 91349 |
5.65 |
| 2026-06-17 12:00 |
18:37:36.56 |
-13:23:06.4 |
HIP 91349 |
6.98 |
| 2026-06-18 00:00 |
18:37:24.19 |
-13:23:15.9 |
HIP 91349 |
9.15 |
| 2026-06-18 12:00 |
18:37:11.78 |
-13:23:25.8 |
HIP 91349 |
11.70 |
| 2026-06-19 00:00 |
18:36:59.34 |
-13:23:36.0 |
HIP 91349 |
14.44 |
| 2026-06-19 12:00 |
18:36:46.87 |
-13:23:46.5 |
HIP 91349 |
17.28 |
| 2026-06-20 00:00 |
18:36:34.37 |
-13:23:57.3 |
HIP 91349 |
20.19 |
| 2026-06-20 12:00 |
18:36:21.85 |
-13:24:08.5 |
HIP 91089 |
23.10 |
| 2026-06-21 00:00 |
18:36:09.30 |
-13:24:20.0 |
HIP 91089 |
20.05 |
| 2026-06-21 12:00 |
18:35:56.74 |
-13:24:31.8 |
HIP 91089 |
16.98 |
| 2026-06-22 00:00 |
18:35:44.15 |
-13:24:43.9 |
HIP 91089 |
13.92 |