| 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) |
| 2026-06-01 00:00 |
05:16:09.03 |
+64:20:45.6 |
HIP 24792 |
20.96 |
| 2026-06-01 12:00 |
05:16:12.28 |
+64:20:44.2 |
HIP 24792 |
20.65 |
| 2026-06-02 00:00 |
05:16:15.53 |
+64:20:42.9 |
HIP 24792 |
20.34 |
| 2026-06-02 12:00 |
05:16:18.78 |
+64:20:41.8 |
HIP 24792 |
20.02 |
| 2026-06-03 00:00 |
05:16:22.04 |
+64:20:40.7 |
HIP 24792 |
19.72 |
| 2026-06-03 12:00 |
05:16:25.30 |
+64:20:39.8 |
HIP 24792 |
19.41 |
| 2026-06-04 00:00 |
05:16:28.57 |
+64:20:39.0 |
HIP 24792 |
19.11 |
| 2026-06-04 12:00 |
05:16:31.84 |
+64:20:38.2 |
HIP 24792 |
18.81 |
| 2026-06-05 00:00 |
05:16:35.11 |
+64:20:37.7 |
HIP 24792 |
18.51 |
| 2026-06-05 12:00 |
05:16:38.38 |
+64:20:37.2 |
HIP 24792 |
18.21 |
| 2026-06-06 00:00 |
05:16:41.66 |
+64:20:36.8 |
HIP 24792 |
17.92 |
| 2026-06-06 12:00 |
05:16:44.94 |
+64:20:36.6 |
HIP 24792 |
17.63 |
| 2026-06-07 00:00 |
05:16:48.22 |
+64:20:36.4 |
HIP 24792 |
17.35 |
| 2026-06-07 12:00 |
05:16:51.51 |
+64:20:36.4 |
HIP 24792 |
17.06 |
| 2026-06-08 00:00 |
05:16:54.79 |
+64:20:36.5 |
HIP 24792 |
16.79 |
| 2026-06-08 12:00 |
05:16:58.08 |
+64:20:36.7 |
HIP 24792 |
16.51 |
| 2026-06-09 00:00 |
05:17:01.37 |
+64:20:37.1 |
HIP 24792 |
16.24 |
| 2026-06-09 12:00 |
05:17:04.65 |
+64:20:37.5 |
HIP 24792 |
15.98 |
| 2026-06-10 00:00 |
05:17:07.94 |
+64:20:38.1 |
HIP 24792 |
15.72 |
| 2026-06-10 12:00 |
05:17:11.24 |
+64:20:38.7 |
HIP 24792 |
15.46 |
| 2026-06-11 00:00 |
05:17:14.53 |
+64:20:39.5 |
HIP 24792 |
15.21 |
| 2026-06-11 12:00 |
05:17:17.82 |
+64:20:40.4 |
HIP 24792 |
14.97 |
| 2026-06-12 00:00 |
05:17:21.11 |
+64:20:41.4 |
HIP 24792 |
14.73 |
| 2026-06-12 12:00 |
05:17:24.40 |
+64:20:42.5 |
HIP 24792 |
14.50 |
| 2026-06-13 00:00 |
05:17:27.69 |
+64:20:43.8 |
HIP 24792 |
14.28 |
| 2026-06-13 12:00 |
05:17:30.98 |
+64:20:45.1 |
HIP 24792 |
14.06 |
| 2026-06-14 00:00 |
05:17:34.27 |
+64:20:46.6 |
HIP 24792 |
13.85 |
| 2026-06-14 12:00 |
05:17:37.56 |
+64:20:48.2 |
HIP 24792 |
13.65 |
| 2026-06-15 00:00 |
05:17:40.85 |
+64:20:49.9 |
HIP 24792 |
13.45 |
| 2026-06-15 12:00 |
05:17:44.13 |
+64:20:51.7 |
HIP 24792 |
13.27 |
| 2026-06-16 00:00 |
05:17:47.42 |
+64:20:53.6 |
HIP 24792 |
13.09 |
| 2026-06-16 12:00 |
05:17:50.70 |
+64:20:55.7 |
HIP 24792 |
12.92 |
| 2026-06-17 00:00 |
05:17:53.98 |
+64:20:57.8 |
HIP 24792 |
12.76 |
| 2026-06-17 12:00 |
05:17:57.25 |
+64:21:00.1 |
HIP 24792 |
12.62 |
| 2026-06-18 00:00 |
05:18:00.53 |
+64:21:02.5 |
HIP 24792 |
12.48 |
| 2026-06-18 12:00 |
05:18:03.80 |
+64:21:05.0 |
HIP 24792 |
12.35 |
| 2026-06-19 00:00 |
05:18:07.07 |
+64:21:07.6 |
HIP 24792 |
12.23 |
| 2026-06-19 12:00 |
05:18:10.33 |
+64:21:10.3 |
HIP 24792 |
12.13 |
| 2026-06-20 00:00 |
05:18:13.59 |
+64:21:13.1 |
HIP 24792 |
12.04 |
| 2026-06-20 12:00 |
05:18:16.85 |
+64:21:16.1 |
HIP 24792 |
11.95 |
| 2026-06-21 00:00 |
05:18:20.10 |
+64:21:19.1 |
HIP 24792 |
11.88 |
| 2026-06-21 12:00 |
05:18:23.35 |
+64:21:22.3 |
HIP 24792 |
11.83 |
| 2026-06-22 00:00 |
05:18:26.59 |
+64:21:25.6 |
HIP 24808 |
11.76 |