P/2022 B1 (Wierzchos)
| 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) |
| 2026-02-03 00:00 |
18:33:54.82 |
-14:59:19.9 |
HIP 90991 |
8.97 |
| 2026-02-03 12:00 |
18:34:09.11 |
-14:58:55.7 |
HIP 90991 |
10.60 |
| 2026-02-04 00:00 |
18:34:23.33 |
-14:58:31.4 |
HIP 90991 |
12.96 |
| 2026-02-04 12:00 |
18:34:37.49 |
-14:58:06.8 |
HIP 90991 |
15.72 |
| 2026-02-05 00:00 |
18:34:51.58 |
-14:57:41.9 |
HIP 90991 |
18.69 |
| 2026-02-05 12:00 |
18:35:05.62 |
-14:57:16.9 |
HIP 90991 |
21.79 |
| 2026-02-06 00:00 |
18:35:19.59 |
-14:56:51.7 |
HIP 90991 |
24.95 |
| 2026-02-06 12:00 |
18:35:33.50 |
-14:56:26.3 |
HIP 91280 |
23.64 |
| 2026-02-07 00:00 |
18:35:47.34 |
-14:56:00.6 |
HIP 91280 |
20.50 |
| 2026-02-07 12:00 |
18:36:01.12 |
-14:55:34.8 |
HIP 91280 |
17.47 |
| 2026-02-08 00:00 |
18:36:14.83 |
-14:55:08.7 |
HIP 91280 |
14.59 |
| 2026-02-08 12:00 |
18:36:28.47 |
-14:54:42.5 |
HIP 91280 |
11.97 |
| 2026-02-09 00:00 |
18:36:42.05 |
-14:54:16.0 |
HIP 91280 |
9.79 |
| 2026-02-09 12:00 |
18:36:55.56 |
-14:53:49.4 |
HIP 91280 |
8.41 |
| 2026-02-10 00:00 |
18:37:09.00 |
-14:53:22.5 |
HIP 91280 |
8.20 |
| 2026-02-10 12:00 |
18:37:22.36 |
-14:52:55.5 |
HIP 91280 |
9.23 |
| 2026-02-11 00:00 |
18:37:35.66 |
-14:52:28.3 |
HIP 91280 |
11.14 |
| 2026-02-11 12:00 |
18:37:48.89 |
-14:52:00.9 |
HIP 91280 |
13.56 |
| 2026-02-12 00:00 |
18:38:02.05 |
-14:51:33.3 |
HIP 91280 |
16.25 |
| 2026-02-12 12:00 |
18:38:15.13 |
-14:51:05.5 |
HIP 91448 |
16.06 |
| 2026-02-13 00:00 |
18:38:28.14 |
-14:50:37.6 |
HIP 91448 |
14.37 |
| 2026-02-13 12:00 |
18:38:41.08 |
-14:50:09.4 |
HIP 91448 |
13.25 |
| 2026-02-14 00:00 |
18:38:53.94 |
-14:49:41.1 |
HIP 91448 |
12.84 |
| 2026-02-14 12:00 |
18:39:06.73 |
-14:49:12.7 |
HIP 91448 |
13.18 |
| 2026-02-15 00:00 |
18:39:19.44 |
-14:48:44.0 |
HIP 91448 |
14.22 |
| 2026-02-15 12:00 |
18:39:32.07 |
-14:48:15.2 |
HIP 91448 |
15.81 |
| 2026-02-16 00:00 |
18:39:44.63 |
-14:47:46.2 |
HIP 91448 |
17.78 |
| 2026-02-16 12:00 |
18:39:57.11 |
-14:47:17.1 |
HIP 91623 |
17.40 |
| 2026-02-17 00:00 |
18:40:09.51 |
-14:46:47.8 |
HIP 91623 |
14.36 |
| 2026-02-17 12:00 |
18:40:21.83 |
-14:46:18.4 |
HIP 91623 |
11.36 |
| 2026-02-18 00:00 |
18:40:34.07 |
-14:45:48.8 |
HIP 91623 |
8.37 |
| 2026-02-18 12:00 |
18:40:46.23 |
-14:45:19.0 |
HIP 91623 |
5.42 |
| 2026-02-19 00:00 |
18:40:58.31 |
-14:44:49.2 |
HIP 91623 |
2.57 |
| 2026-02-19 12:00 |
18:41:10.30 |
-14:44:19.1 |
HIP 91623 |
1.16 |
| 2026-02-20 00:00 |
18:41:22.21 |
-14:43:48.9 |
HIP 91623 |
3.65 |
| 2026-02-20 12:00 |
18:41:34.04 |
-14:43:18.6 |
HIP 91623 |
6.49 |
| 2026-02-21 00:00 |
18:41:45.79 |
-14:42:48.2 |
HIP 91677 |
8.98 |
| 2026-02-21 12:00 |
18:41:57.45 |
-14:42:17.6 |
HIP 91677 |
9.18 |
| 2026-02-22 00:00 |
18:42:09.02 |
-14:41:46.9 |
HIP 91677 |
10.20 |
| 2026-02-22 12:00 |
18:42:20.51 |
-14:41:16.1 |
HIP 91677 |
11.82 |
| 2026-02-23 00:00 |
18:42:31.91 |
-14:40:45.1 |
HIP 91677 |
13.81 |
| 2026-02-23 12:00 |
18:42:43.23 |
-14:40:14.0 |
HIP 91677 |
16.02 |
| 2026-02-24 00:00 |
18:42:54.45 |
-14:39:42.9 |
HIP 91677 |
18.38 |