| Parameter |
Value |
| Designation |
C/1975 T2 (Suzuki-Saigusa-Mori) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1975-10-15T08:38:49.142400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:24Z |
| Obs used |
112 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1975-10-31.0000000 |
| e |
0.98560140 |
| q (au) |
0.838053 |
| a (au) |
58.203770 |
| i (deg) |
118.232772 |
| Ω (om, deg) |
216.805399 |
| ω (w, deg) |
152.019697 |
| M (ma, deg) |
0.034714 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.537 + 2.320\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.537 |
| n |
2.320 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
14:46:25.87 |
-49:33:42.1 |
HIP 72246 |
0.55 |
| 2026-07-29 12:00 |
14:46:25.50 |
-49:33:26.0 |
HIP 72246 |
0.43 |
| 2026-07-30 00:00 |
14:46:25.15 |
-49:33:09.8 |
HIP 72246 |
0.46 |
| 2026-07-30 12:00 |
14:46:24.82 |
-49:32:53.8 |
HIP 72246 |
0.62 |
| 2026-07-31 00:00 |
14:46:24.52 |
-49:32:37.8 |
HIP 72246 |
0.84 |
| 2026-07-31 12:00 |
14:46:24.24 |
-49:32:21.8 |
HIP 72246 |
1.08 |
| 2026-08-01 00:00 |
14:46:23.98 |
-49:32:05.8 |
HIP 72246 |
1.33 |
| 2026-08-01 12:00 |
14:46:23.74 |
-49:31:50.0 |
HIP 72246 |
1.59 |
| 2026-08-02 00:00 |
14:46:23.53 |
-49:31:34.1 |
HIP 72246 |
1.84 |
| 2026-08-02 12:00 |
14:46:23.33 |
-49:31:18.3 |
HIP 72246 |
2.10 |
| 2026-08-03 00:00 |
14:46:23.16 |
-49:31:02.6 |
HIP 72246 |
2.36 |
| 2026-08-03 12:00 |
14:46:23.01 |
-49:30:46.9 |
HIP 72246 |
2.61 |
| 2026-08-04 00:00 |
14:46:22.89 |
-49:30:31.3 |
HIP 72246 |
2.87 |
| 2026-08-04 12:00 |
14:46:22.78 |
-49:30:15.7 |
HIP 72246 |
3.12 |
| 2026-08-05 00:00 |
14:46:22.70 |
-49:30:00.2 |
HIP 72246 |
3.37 |
| 2026-08-05 12:00 |
14:46:22.64 |
-49:29:44.7 |
HIP 72246 |
3.63 |
| 2026-08-06 00:00 |
14:46:22.61 |
-49:29:29.3 |
HIP 72246 |
3.88 |
| 2026-08-06 12:00 |
14:46:22.59 |
-49:29:13.9 |
HIP 72246 |
4.13 |
| 2026-08-07 00:00 |
14:46:22.60 |
-49:28:58.6 |
HIP 72246 |
4.38 |
| 2026-08-07 12:00 |
14:46:22.63 |
-49:28:43.4 |
HIP 72246 |
4.63 |
| 2026-08-08 00:00 |
14:46:22.68 |
-49:28:28.2 |
HIP 72246 |
4.87 |
| 2026-08-08 12:00 |
14:46:22.76 |
-49:28:13.1 |
HIP 72246 |
5.12 |
| 2026-08-09 00:00 |
14:46:22.86 |
-49:27:58.1 |
HIP 72246 |
5.36 |
| 2026-08-09 12:00 |
14:46:22.98 |
-49:27:43.1 |
HIP 72246 |
5.61 |
| 2026-08-10 00:00 |
14:46:23.12 |
-49:27:28.2 |
HIP 72246 |
5.85 |
| 2026-08-10 12:00 |
14:46:23.28 |
-49:27:13.3 |
HIP 72246 |
6.09 |
| 2026-08-11 00:00 |
14:46:23.47 |
-49:26:58.5 |
HIP 72246 |
6.33 |
| 2026-08-11 12:00 |
14:46:23.68 |
-49:26:43.8 |
HIP 72246 |
6.57 |
| 2026-08-12 00:00 |
14:46:23.91 |
-49:26:29.2 |
HIP 72246 |
6.81 |
| 2026-08-12 12:00 |
14:46:24.16 |
-49:26:14.6 |
HIP 72246 |
7.05 |
| 2026-08-13 00:00 |
14:46:24.44 |
-49:26:00.1 |
HIP 72246 |
7.29 |
| 2026-08-13 12:00 |
14:46:24.74 |
-49:25:45.7 |
HIP 72246 |
7.53 |
| 2026-08-14 00:00 |
14:46:25.06 |
-49:25:31.3 |
HIP 72246 |
7.76 |
| 2026-08-14 12:00 |
14:46:25.40 |
-49:25:17.0 |
HIP 72246 |
8.00 |
| 2026-08-15 00:00 |
14:46:25.77 |
-49:25:02.8 |
HIP 72246 |
8.23 |
| 2026-08-15 12:00 |
14:46:26.15 |
-49:24:48.7 |
HIP 72246 |
8.46 |
| 2026-08-16 00:00 |
14:46:26.56 |
-49:24:34.7 |
HIP 72246 |
8.69 |
| 2026-08-16 12:00 |
14:46:26.99 |
-49:24:20.7 |
HIP 72246 |
8.92 |
| 2026-08-17 00:00 |
14:46:27.45 |
-49:24:06.8 |
HIP 72246 |
9.16 |
| 2026-08-17 12:00 |
14:46:27.92 |
-49:23:53.0 |
HIP 72246 |
9.39 |
| 2026-08-18 00:00 |
14:46:28.42 |
-49:23:39.3 |
HIP 72246 |
9.61 |
| 2026-08-18 12:00 |
14:46:28.94 |
-49:23:25.6 |
HIP 72246 |
9.84 |
| 2026-08-19 00:00 |
14:46:29.48 |
-49:23:12.1 |
HIP 72246 |
10.07 |