| Parameter |
Value |
| Designation |
C/1994 J2 (Takamizawa) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-06-29T14:44:36.781440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
399 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
4.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1994-12-15.0000000 |
| e |
0.99623127 |
| q (au) |
1.947740 |
| a (au) |
516.815888 |
| i (deg) |
135.961791 |
| Ω (om, deg) |
51.129192 |
| ω (w, deg) |
192.116161 |
| M (ma, deg) |
0.014126 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.389 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.389 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.972 |
| 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 |
03:48:49.64 |
+13:37:16.4 |
HIP 17714 |
32.87 |
| 2026-06-01 12:00 |
03:48:51.66 |
+13:37:23.1 |
HIP 17714 |
33.04 |
| 2026-06-02 00:00 |
03:48:53.69 |
+13:37:29.7 |
HIP 17714 |
33.22 |
| 2026-06-02 12:00 |
03:48:55.71 |
+13:37:36.2 |
HIP 17714 |
33.40 |
| 2026-06-03 00:00 |
03:48:57.72 |
+13:37:42.8 |
HIP 17714 |
33.59 |
| 2026-06-03 12:00 |
03:48:59.73 |
+13:37:49.2 |
HIP 17714 |
33.78 |
| 2026-06-04 00:00 |
03:49:01.74 |
+13:37:55.7 |
HIP 17714 |
33.98 |
| 2026-06-04 12:00 |
03:49:03.74 |
+13:38:02.1 |
HIP 17714 |
34.19 |
| 2026-06-05 00:00 |
03:49:05.74 |
+13:38:08.4 |
HIP 17714 |
34.40 |
| 2026-06-05 12:00 |
03:49:07.73 |
+13:38:14.7 |
HIP 17714 |
34.62 |
| 2026-06-06 00:00 |
03:49:09.72 |
+13:38:21.0 |
HIP 17714 |
34.85 |
| 2026-06-06 12:00 |
03:49:11.71 |
+13:38:27.2 |
HIP 17714 |
35.08 |
| 2026-06-07 00:00 |
03:49:13.69 |
+13:38:33.4 |
HIP 17714 |
35.31 |
| 2026-06-07 12:00 |
03:49:15.67 |
+13:38:39.5 |
HIP 17714 |
35.55 |
| 2026-06-08 00:00 |
03:49:17.64 |
+13:38:45.6 |
HIP 17714 |
35.80 |
| 2026-06-08 12:00 |
03:49:19.60 |
+13:38:51.6 |
HIP 17714 |
36.04 |
| 2026-06-09 00:00 |
03:49:21.56 |
+13:38:57.6 |
HIP 17714 |
36.30 |
| 2026-06-09 12:00 |
03:49:23.52 |
+13:39:03.5 |
HIP 17714 |
36.56 |
| 2026-06-10 00:00 |
03:49:25.46 |
+13:39:09.4 |
HIP 17714 |
36.82 |
| 2026-06-10 12:00 |
03:49:27.41 |
+13:39:15.3 |
HIP 17714 |
37.09 |
| 2026-06-11 00:00 |
03:49:29.34 |
+13:39:21.0 |
HIP 17714 |
37.36 |
| 2026-06-11 12:00 |
03:49:31.28 |
+13:39:26.8 |
HIP 17714 |
37.63 |
| 2026-06-12 00:00 |
03:49:33.20 |
+13:39:32.5 |
HIP 17714 |
37.91 |
| 2026-06-12 12:00 |
03:49:35.12 |
+13:39:38.1 |
HIP 17714 |
38.19 |
| 2026-06-13 00:00 |
03:49:37.03 |
+13:39:43.7 |
HIP 17714 |
38.47 |
| 2026-06-13 12:00 |
03:49:38.94 |
+13:39:49.3 |
HIP 17714 |
38.76 |
| 2026-06-14 00:00 |
03:49:40.84 |
+13:39:54.8 |
HIP 17714 |
39.05 |
| 2026-06-14 12:00 |
03:49:42.73 |
+13:40:00.2 |
HIP 17714 |
39.34 |
| 2026-06-15 00:00 |
03:49:44.61 |
+13:40:05.6 |
HIP 17714 |
39.64 |
| 2026-06-15 12:00 |
03:49:46.49 |
+13:40:11.0 |
HIP 17714 |
39.93 |
| 2026-06-16 00:00 |
03:49:48.36 |
+13:40:16.3 |
HIP 17714 |
40.23 |
| 2026-06-16 12:00 |
03:49:50.22 |
+13:40:21.5 |
HIP 17714 |
40.54 |
| 2026-06-17 00:00 |
03:49:52.08 |
+13:40:26.7 |
HIP 17714 |
40.84 |
| 2026-06-17 12:00 |
03:49:53.93 |
+13:40:31.8 |
HIP 17714 |
41.15 |
| 2026-06-18 00:00 |
03:49:55.77 |
+13:40:36.9 |
HIP 17714 |
41.45 |
| 2026-06-18 12:00 |
03:49:57.60 |
+13:40:41.9 |
HIP 17714 |
41.76 |
| 2026-06-19 00:00 |
03:49:59.42 |
+13:40:46.9 |
HIP 17714 |
42.07 |
| 2026-06-19 12:00 |
03:50:01.24 |
+13:40:51.8 |
HIP 18033 |
42.20 |
| 2026-06-20 00:00 |
03:50:03.04 |
+13:40:56.7 |
HIP 18033 |
42.08 |
| 2026-06-20 12:00 |
03:50:04.84 |
+13:41:01.5 |
HIP 18033 |
41.98 |
| 2026-06-21 00:00 |
03:50:06.63 |
+13:41:06.2 |
HIP 18033 |
41.87 |
| 2026-06-21 12:00 |
03:50:08.41 |
+13:41:10.9 |
HIP 18145 |
41.58 |
| 2026-06-22 00:00 |
03:50:10.18 |
+13:41:15.6 |
HIP 18145 |
41.15 |