| Parameter |
Value |
| Designation |
70P/Kojima |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-10-20T16:00:34.519680Z |
| Orbit solution date (soln_date, UTC) |
2026-05-06T05:40:47Z |
| Obs used |
2097 |
| NEO |
- |
| M1 |
12.500 |
| K1 |
11.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-05-14.0000000 |
| e |
0.45391285 |
| q (au) |
2.006566 |
| a (au) |
3.674443 |
| i (deg) |
6.600119 |
| Ω (om, deg) |
119.270141 |
| ω (w, deg) |
1.953402 |
| M (ma, deg) |
28.732632 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.474 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.474 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.501 |
| k |
1.000 |
| δ90 |
9.842 |
| 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 |
22:36:03.88 |
-11:58:39.8 |
HIP 111652 |
21.27 |
| 2026-06-01 12:00 |
22:36:11.41 |
-11:58:28.2 |
HIP 111652 |
19.84 |
| 2026-06-02 00:00 |
22:36:18.77 |
-11:58:17.7 |
HIP 111652 |
18.53 |
| 2026-06-02 12:00 |
22:36:25.97 |
-11:58:08.2 |
HIP 111652 |
17.35 |
| 2026-06-03 00:00 |
22:36:33.00 |
-11:57:59.8 |
HIP 111652 |
16.31 |
| 2026-06-03 12:00 |
22:36:39.87 |
-11:57:52.5 |
HIP 111652 |
15.43 |
| 2026-06-04 00:00 |
22:36:46.56 |
-11:57:46.3 |
HIP 111652 |
14.72 |
| 2026-06-04 12:00 |
22:36:53.09 |
-11:57:41.1 |
HIP 111652 |
14.20 |
| 2026-06-05 00:00 |
22:36:59.45 |
-11:57:37.0 |
HIP 111652 |
13.86 |
| 2026-06-05 12:00 |
22:37:05.63 |
-11:57:34.1 |
HIP 111652 |
13.71 |
| 2026-06-06 00:00 |
22:37:11.65 |
-11:57:32.2 |
HIP 111652 |
13.74 |
| 2026-06-06 12:00 |
22:37:17.49 |
-11:57:31.5 |
HIP 111652 |
13.94 |
| 2026-06-07 00:00 |
22:37:23.16 |
-11:57:31.8 |
HIP 111652 |
14.28 |
| 2026-06-07 12:00 |
22:37:28.65 |
-11:57:33.3 |
HIP 111652 |
14.75 |
| 2026-06-08 00:00 |
22:37:33.97 |
-11:57:35.9 |
HIP 111652 |
15.32 |
| 2026-06-08 12:00 |
22:37:39.11 |
-11:57:39.6 |
HIP 111652 |
15.97 |
| 2026-06-09 00:00 |
22:37:44.08 |
-11:57:44.5 |
HIP 111652 |
16.68 |
| 2026-06-09 12:00 |
22:37:48.87 |
-11:57:50.4 |
HIP 111652 |
17.43 |
| 2026-06-10 00:00 |
22:37:53.48 |
-11:57:57.6 |
HIP 111652 |
18.22 |
| 2026-06-10 12:00 |
22:37:57.91 |
-11:58:05.8 |
HIP 111652 |
19.03 |
| 2026-06-11 00:00 |
22:38:02.16 |
-11:58:15.2 |
HIP 111652 |
19.85 |
| 2026-06-11 12:00 |
22:38:06.23 |
-11:58:25.8 |
HIP 111652 |
20.67 |
| 2026-06-12 00:00 |
22:38:10.12 |
-11:58:37.5 |
HIP 111652 |
21.49 |
| 2026-06-12 12:00 |
22:38:13.83 |
-11:58:50.4 |
HIP 111652 |
22.30 |
| 2026-06-13 00:00 |
22:38:17.35 |
-11:59:04.4 |
HIP 111652 |
23.10 |
| 2026-06-13 12:00 |
22:38:20.69 |
-11:59:19.6 |
HIP 111652 |
23.89 |
| 2026-06-14 00:00 |
22:38:23.85 |
-11:59:36.0 |
HIP 111652 |
24.65 |
| 2026-06-14 12:00 |
22:38:26.82 |
-11:59:53.5 |
HIP 111652 |
25.40 |
| 2026-06-15 00:00 |
22:38:29.60 |
-12:00:12.2 |
HIP 111652 |
26.13 |
| 2026-06-15 12:00 |
22:38:32.20 |
-12:00:32.1 |
HIP 111652 |
26.83 |
| 2026-06-16 00:00 |
22:38:34.62 |
-12:00:53.2 |
HIP 111652 |
27.51 |
| 2026-06-16 12:00 |
22:38:36.84 |
-12:01:15.4 |
HIP 111652 |
28.17 |
| 2026-06-17 00:00 |
22:38:38.88 |
-12:01:38.8 |
HIP 111652 |
28.80 |
| 2026-06-17 12:00 |
22:38:40.73 |
-12:02:03.4 |
HIP 111652 |
29.41 |
| 2026-06-18 00:00 |
22:38:42.39 |
-12:02:29.2 |
HIP 111652 |
29.99 |
| 2026-06-18 12:00 |
22:38:43.86 |
-12:02:56.2 |
HIP 111652 |
30.56 |
| 2026-06-19 00:00 |
22:38:45.15 |
-12:03:24.3 |
HIP 111652 |
31.09 |
| 2026-06-19 12:00 |
22:38:46.24 |
-12:03:53.6 |
HIP 111652 |
31.61 |
| 2026-06-20 00:00 |
22:38:47.14 |
-12:04:24.1 |
HIP 111652 |
32.10 |
| 2026-06-20 12:00 |
22:38:47.86 |
-12:04:55.8 |
HIP 111652 |
32.58 |
| 2026-06-21 00:00 |
22:38:48.38 |
-12:05:28.7 |
HIP 111652 |
33.03 |
| 2026-06-21 12:00 |
22:38:48.71 |
-12:06:02.7 |
HIP 111870 |
32.81 |
| 2026-06-22 00:00 |
22:38:48.85 |
-12:06:37.9 |
HIP 111870 |
32.24 |