| Parameter |
Value |
| Designation |
P/2007 T2 (Kowalski) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-09-19T00:32:30.549120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:12Z |
| Obs used |
50 |
| NEO |
Yes |
| M1 |
18.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-11-07.0000000 |
| e |
0.77500898 |
| q (au) |
0.695817 |
| a (au) |
3.092645 |
| i (deg) |
9.896422 |
| Ω (om, deg) |
3.997657 |
| ω (w, deg) |
358.553636 |
| M (ma, deg) |
8.875747 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.609 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.609 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.952 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
11:26:21.85 |
+04:02:13.5 |
HIP 55852 |
12.40 |
| 2026-06-01 12:00 |
11:26:21.75 |
+04:01:59.3 |
HIP 55852 |
12.22 |
| 2026-06-02 00:00 |
11:26:21.82 |
+04:01:44.1 |
HIP 55852 |
12.00 |
| 2026-06-02 12:00 |
11:26:22.06 |
+04:01:27.8 |
HIP 55852 |
11.74 |
| 2026-06-03 00:00 |
11:26:22.47 |
+04:01:10.4 |
HIP 55852 |
11.45 |
| 2026-06-03 12:00 |
11:26:23.05 |
+04:00:52.0 |
HIP 55852 |
11.11 |
| 2026-06-04 00:00 |
11:26:23.80 |
+04:00:32.6 |
HIP 55852 |
10.74 |
| 2026-06-04 12:00 |
11:26:24.72 |
+04:00:12.1 |
HIP 55852 |
10.33 |
| 2026-06-05 00:00 |
11:26:25.81 |
+03:59:50.6 |
HIP 55852 |
9.88 |
| 2026-06-05 12:00 |
11:26:27.07 |
+03:59:28.1 |
HIP 55852 |
9.39 |
| 2026-06-06 00:00 |
11:26:28.49 |
+03:59:04.5 |
HIP 55852 |
8.87 |
| 2026-06-06 12:00 |
11:26:30.08 |
+03:58:39.9 |
HIP 55852 |
8.30 |
| 2026-06-07 00:00 |
11:26:31.84 |
+03:58:14.3 |
HIP 55852 |
7.70 |
| 2026-06-07 12:00 |
11:26:33.76 |
+03:57:47.7 |
HIP 55852 |
7.07 |
| 2026-06-08 00:00 |
11:26:35.85 |
+03:57:20.1 |
HIP 55852 |
6.40 |
| 2026-06-08 12:00 |
11:26:38.10 |
+03:56:51.4 |
HIP 55852 |
5.70 |
| 2026-06-09 00:00 |
11:26:40.51 |
+03:56:21.8 |
HIP 55852 |
4.99 |
| 2026-06-09 12:00 |
11:26:43.09 |
+03:55:51.1 |
HIP 55852 |
4.26 |
| 2026-06-10 00:00 |
11:26:45.83 |
+03:55:19.5 |
HIP 55852 |
3.56 |
| 2026-06-10 12:00 |
11:26:48.73 |
+03:54:46.8 |
HIP 55852 |
2.91 |
| 2026-06-11 00:00 |
11:26:51.79 |
+03:54:13.2 |
HIP 55852 |
2.44 |
| 2026-06-11 12:00 |
11:26:55.01 |
+03:53:38.6 |
HIP 55852 |
2.29 |
| 2026-06-12 00:00 |
11:26:58.40 |
+03:53:03.0 |
HIP 55852 |
2.58 |
| 2026-06-12 12:00 |
11:27:01.94 |
+03:52:26.4 |
HIP 55852 |
3.23 |
| 2026-06-13 00:00 |
11:27:05.64 |
+03:51:48.8 |
HIP 55852 |
4.10 |
| 2026-06-13 12:00 |
11:27:09.50 |
+03:51:10.3 |
HIP 55852 |
5.11 |
| 2026-06-14 00:00 |
11:27:13.51 |
+03:50:30.8 |
HIP 55852 |
6.21 |
| 2026-06-14 12:00 |
11:27:17.68 |
+03:49:50.3 |
HIP 55852 |
7.39 |
| 2026-06-15 00:00 |
11:27:22.01 |
+03:49:08.9 |
HIP 55852 |
8.62 |
| 2026-06-15 12:00 |
11:27:26.49 |
+03:48:26.5 |
HIP 55852 |
9.91 |
| 2026-06-16 00:00 |
11:27:31.13 |
+03:47:43.2 |
HIP 55915 |
11.04 |
| 2026-06-16 12:00 |
11:27:35.92 |
+03:46:59.0 |
HIP 55915 |
11.63 |
| 2026-06-17 00:00 |
11:27:40.86 |
+03:46:13.7 |
HIP 55915 |
12.38 |
| 2026-06-17 12:00 |
11:27:45.95 |
+03:45:27.6 |
HIP 55915 |
13.26 |
| 2026-06-18 00:00 |
11:27:51.19 |
+03:44:40.5 |
HIP 55915 |
14.27 |
| 2026-06-18 12:00 |
11:27:56.59 |
+03:43:52.6 |
HIP 55915 |
15.39 |
| 2026-06-19 00:00 |
11:28:02.13 |
+03:43:03.7 |
HIP 55915 |
16.61 |
| 2026-06-19 12:00 |
11:28:07.82 |
+03:42:13.8 |
HIP 55915 |
17.91 |
| 2026-06-20 00:00 |
11:28:13.66 |
+03:41:23.1 |
HIP 55915 |
19.30 |
| 2026-06-20 12:00 |
11:28:19.64 |
+03:40:31.5 |
HIP 56073 |
20.02 |
| 2026-06-21 00:00 |
11:28:25.77 |
+03:39:39.0 |
HIP 56073 |
18.88 |
| 2026-06-21 12:00 |
11:28:32.04 |
+03:38:45.6 |
HIP 56073 |
17.83 |
| 2026-06-22 00:00 |
11:28:38.46 |
+03:37:51.3 |
HIP 56073 |
16.88 |