| Parameter |
Value |
| Designation |
C/2022 A1 (Sarneczky) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-01-31T03:23:29.235840Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:12Z |
| Obs used |
316 |
| NEO |
- |
| M1 |
18.400 |
| K1 |
17.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-01-02T02:37:18.336000Z |
| Discovery magnitude (MPC) |
18.20 R |
| Discovery observatory (MPC) |
K88 · GINOP-KHK, Piszkéstető |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-01-07.0000000 |
| e |
0.99916780 |
| q (au) |
1.252910 |
| a (au) |
1505.543465 |
| i (deg) |
116.526637 |
| Ω (om, deg) |
285.521193 |
| ω (w, deg) |
201.184705 |
| M (ma, deg) |
359.999593 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.046 + 5.791\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.046 |
| n |
5.791 |
| gf |
1.000 |
| gb |
-0.582 |
| k |
0.986 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
20:03:44.51 |
-33:12:53.3 |
HIP 98960 |
25.95 |
| 2026-03-26 12:00 |
20:03:47.67 |
-33:12:58.1 |
HIP 98960 |
25.42 |
| 2026-03-27 00:00 |
20:03:50.75 |
-33:13:03.1 |
HIP 98960 |
24.91 |
| 2026-03-27 12:00 |
20:03:53.75 |
-33:13:08.4 |
HIP 98960 |
24.42 |
| 2026-03-28 00:00 |
20:03:56.68 |
-33:13:14.1 |
HIP 98960 |
23.96 |
| 2026-03-28 12:00 |
20:03:59.53 |
-33:13:20.0 |
HIP 98960 |
23.52 |
| 2026-03-29 00:00 |
20:04:02.29 |
-33:13:26.2 |
HIP 98960 |
23.11 |
| 2026-03-29 12:00 |
20:04:04.98 |
-33:13:32.8 |
HIP 98960 |
22.72 |
| 2026-03-30 00:00 |
20:04:07.59 |
-33:13:39.6 |
HIP 98960 |
22.35 |
| 2026-03-30 12:00 |
20:04:10.12 |
-33:13:46.7 |
HIP 98960 |
22.01 |
| 2026-03-31 00:00 |
20:04:12.56 |
-33:13:54.1 |
HIP 98960 |
21.69 |
| 2026-03-31 12:00 |
20:04:14.93 |
-33:14:01.8 |
HIP 98960 |
21.39 |
| 2026-04-01 00:00 |
20:04:17.22 |
-33:14:09.8 |
HIP 98960 |
21.13 |
| 2026-04-01 12:00 |
20:04:19.42 |
-33:14:18.1 |
HIP 98960 |
20.88 |
| 2026-04-02 00:00 |
20:04:21.55 |
-33:14:26.7 |
HIP 98960 |
20.66 |
| 2026-04-02 12:00 |
20:04:23.59 |
-33:14:35.6 |
HIP 98960 |
20.46 |
| 2026-04-03 00:00 |
20:04:25.55 |
-33:14:44.8 |
HIP 98960 |
20.29 |
| 2026-04-03 12:00 |
20:04:27.43 |
-33:14:54.2 |
HIP 98960 |
20.13 |
| 2026-04-04 00:00 |
20:04:29.22 |
-33:15:04.0 |
HIP 98960 |
20.01 |
| 2026-04-04 12:00 |
20:04:30.93 |
-33:15:14.0 |
HIP 98960 |
19.90 |
| 2026-04-05 00:00 |
20:04:32.56 |
-33:15:24.3 |
HIP 98960 |
19.81 |
| 2026-04-05 12:00 |
20:04:34.11 |
-33:15:34.9 |
HIP 98960 |
19.75 |
| 2026-04-06 00:00 |
20:04:35.57 |
-33:15:45.8 |
HIP 98960 |
19.71 |
| 2026-04-06 12:00 |
20:04:36.95 |
-33:15:57.0 |
HIP 98960 |
19.69 |
| 2026-04-07 00:00 |
20:04:38.25 |
-33:16:08.4 |
HIP 98960 |
19.69 |
| 2026-04-07 12:00 |
20:04:39.46 |
-33:16:20.1 |
HIP 98960 |
19.71 |
| 2026-04-08 00:00 |
20:04:40.58 |
-33:16:32.2 |
HIP 98960 |
19.74 |
| 2026-04-08 12:00 |
20:04:41.63 |
-33:16:44.4 |
HIP 98960 |
19.80 |
| 2026-04-09 00:00 |
20:04:42.58 |
-33:16:57.0 |
HIP 98960 |
19.87 |
| 2026-04-09 12:00 |
20:04:43.45 |
-33:17:09.9 |
HIP 98960 |
19.96 |
| 2026-04-10 00:00 |
20:04:44.24 |
-33:17:23.0 |
HIP 98960 |
20.06 |
| 2026-04-10 12:00 |
20:04:44.94 |
-33:17:36.4 |
HIP 98960 |
20.19 |
| 2026-04-11 00:00 |
20:04:45.55 |
-33:17:50.0 |
HIP 98960 |
20.32 |
| 2026-04-11 12:00 |
20:04:46.08 |
-33:18:04.0 |
HIP 98960 |
20.48 |
| 2026-04-12 00:00 |
20:04:46.52 |
-33:18:18.2 |
HIP 98960 |
20.64 |
| 2026-04-12 12:00 |
20:04:46.87 |
-33:18:32.6 |
HIP 98960 |
20.82 |
| 2026-04-13 00:00 |
20:04:47.14 |
-33:18:47.4 |
HIP 98960 |
21.02 |
| 2026-04-13 12:00 |
20:04:47.32 |
-33:19:02.4 |
HIP 98960 |
21.22 |
| 2026-04-14 00:00 |
20:04:47.41 |
-33:19:17.7 |
HIP 98960 |
21.44 |
| 2026-04-14 12:00 |
20:04:47.42 |
-33:19:33.2 |
HIP 98960 |
21.68 |
| 2026-04-15 00:00 |
20:04:47.33 |
-33:19:49.0 |
HIP 98960 |
21.92 |
| 2026-04-15 12:00 |
20:04:47.16 |
-33:20:05.0 |
HIP 98960 |
22.18 |
| 2026-04-16 00:00 |
20:04:46.90 |
-33:20:21.3 |
HIP 98960 |
22.45 |