| Parameter |
Value |
| Designation |
C/1970 U1 (Suzuki-Sato-Seki) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1970-10-01T19:05:27.113280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:19Z |
| Obs used |
47 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
18.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1970-10-31.0000000 |
| e |
1.00000000 |
| q (au) |
0.405493 |
| a (au) |
- |
| i (deg) |
60.785050 |
| Ω (om, deg) |
293.680878 |
| ω (w, deg) |
318.520987 |
| M (ma, deg) |
- |
Magnitude
Scatter + Global Linear
$$
M_a = (8.314 + 3.396\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.314 |
| n |
3.396 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
05:10:53.57 |
+64:39:26.2 |
HIP 24017 |
17.39 |
| 2026-03-26 12:00 |
05:10:54.52 |
+64:39:12.5 |
HIP 24017 |
17.64 |
| 2026-03-27 00:00 |
05:10:55.49 |
+64:38:58.7 |
HIP 24017 |
17.89 |
| 2026-03-27 12:00 |
05:10:56.49 |
+64:38:45.1 |
HIP 24017 |
18.14 |
| 2026-03-28 00:00 |
05:10:57.52 |
+64:38:31.4 |
HIP 24017 |
18.40 |
| 2026-03-28 12:00 |
05:10:58.58 |
+64:38:17.9 |
HIP 24017 |
18.65 |
| 2026-03-29 00:00 |
05:10:59.66 |
+64:38:04.3 |
HIP 24017 |
18.90 |
| 2026-03-29 12:00 |
05:11:00.77 |
+64:37:50.9 |
HIP 24017 |
19.16 |
| 2026-03-30 00:00 |
05:11:01.91 |
+64:37:37.5 |
HIP 24017 |
19.41 |
| 2026-03-30 12:00 |
05:11:03.07 |
+64:37:24.1 |
HIP 24017 |
19.66 |
| 2026-03-31 00:00 |
05:11:04.26 |
+64:37:10.8 |
HIP 24017 |
19.92 |
| 2026-03-31 12:00 |
05:11:05.48 |
+64:36:57.6 |
HIP 24017 |
20.17 |
| 2026-04-01 00:00 |
05:11:06.72 |
+64:36:44.4 |
HIP 24017 |
20.43 |
| 2026-04-01 12:00 |
05:11:07.99 |
+64:36:31.3 |
HIP 24017 |
20.68 |
| 2026-04-02 00:00 |
05:11:09.28 |
+64:36:18.3 |
HIP 24017 |
20.94 |
| 2026-04-02 12:00 |
05:11:10.60 |
+64:36:05.3 |
HIP 24270 |
20.82 |
| 2026-04-03 00:00 |
05:11:11.95 |
+64:35:52.3 |
HIP 24270 |
20.56 |
| 2026-04-03 12:00 |
05:11:13.32 |
+64:35:39.5 |
HIP 24270 |
20.30 |
| 2026-04-04 00:00 |
05:11:14.72 |
+64:35:26.7 |
HIP 24270 |
20.05 |
| 2026-04-04 12:00 |
05:11:16.14 |
+64:35:13.9 |
HIP 24270 |
19.79 |
| 2026-04-05 00:00 |
05:11:17.59 |
+64:35:01.2 |
HIP 24270 |
19.53 |
| 2026-04-05 12:00 |
05:11:19.07 |
+64:34:48.6 |
HIP 24270 |
19.28 |
| 2026-04-06 00:00 |
05:11:20.57 |
+64:34:36.1 |
HIP 24270 |
19.02 |
| 2026-04-06 12:00 |
05:11:22.09 |
+64:34:23.6 |
HIP 24270 |
18.76 |
| 2026-04-07 00:00 |
05:11:23.64 |
+64:34:11.2 |
HIP 24270 |
18.51 |
| 2026-04-07 12:00 |
05:11:25.22 |
+64:33:58.9 |
HIP 24270 |
18.25 |
| 2026-04-08 00:00 |
05:11:26.81 |
+64:33:46.6 |
HIP 24270 |
18.00 |
| 2026-04-08 12:00 |
05:11:28.44 |
+64:33:34.4 |
HIP 24270 |
17.74 |
| 2026-04-09 00:00 |
05:11:30.09 |
+64:33:22.3 |
HIP 24270 |
17.48 |
| 2026-04-09 12:00 |
05:11:31.76 |
+64:33:10.2 |
HIP 24270 |
17.23 |
| 2026-04-10 00:00 |
05:11:33.45 |
+64:32:58.2 |
HIP 24270 |
16.98 |
| 2026-04-10 12:00 |
05:11:35.18 |
+64:32:46.3 |
HIP 24270 |
16.72 |
| 2026-04-11 00:00 |
05:11:36.92 |
+64:32:34.5 |
HIP 24270 |
16.47 |
| 2026-04-11 12:00 |
05:11:38.69 |
+64:32:22.7 |
HIP 24270 |
16.22 |
| 2026-04-12 00:00 |
05:11:40.48 |
+64:32:11.1 |
HIP 24270 |
15.97 |
| 2026-04-12 12:00 |
05:11:42.30 |
+64:31:59.5 |
HIP 24270 |
15.72 |
| 2026-04-13 00:00 |
05:11:44.13 |
+64:31:47.9 |
HIP 24270 |
15.47 |
| 2026-04-13 12:00 |
05:11:46.00 |
+64:31:36.5 |
HIP 24270 |
15.22 |
| 2026-04-14 00:00 |
05:11:47.88 |
+64:31:25.1 |
HIP 24270 |
14.98 |
| 2026-04-14 12:00 |
05:11:49.79 |
+64:31:13.8 |
HIP 24270 |
14.74 |
| 2026-04-15 00:00 |
05:11:51.72 |
+64:31:02.6 |
HIP 24270 |
14.49 |
| 2026-04-15 12:00 |
05:11:53.67 |
+64:30:51.5 |
HIP 24270 |
14.25 |
| 2026-04-16 00:00 |
05:11:55.65 |
+64:30:40.4 |
HIP 24270 |
14.02 |