메타데이터
| 항목 |
값 |
| 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 궤도요소
| 항목 |
값 |
| 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 |
밝기
산란 + 전체 선형
$$
M_a = (18.609 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.609 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.952 |
| δ90 |
1.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:13:48.31 |
-01:47:15.3 |
HIP 59669 |
10.36 |
| 2026-09-20 12:00 |
12:14:08.12 |
-01:49:33.7 |
HIP 59669 |
11.06 |
| 2026-09-21 00:00 |
12:14:27.94 |
-01:51:52.2 |
HIP 59669 |
14.05 |
| 2026-09-21 12:00 |
12:14:47.77 |
-01:54:10.8 |
HIP 59669 |
18.22 |
| 2026-09-22 00:00 |
12:15:07.62 |
-01:56:29.4 |
HIP 59669 |
22.95 |
| 2026-09-22 12:00 |
12:15:27.48 |
-01:58:48.1 |
HIP 59669 |
27.95 |
| 2026-09-23 00:00 |
12:15:47.35 |
-02:01:06.8 |
HIP 59669 |
33.11 |
| 2026-09-23 12:00 |
12:16:07.22 |
-02:03:25.7 |
HIP 59979 |
32.11 |
| 2026-09-24 00:00 |
12:16:27.11 |
-02:05:44.5 |
HIP 59979 |
28.96 |
| 2026-09-24 12:00 |
12:16:47.01 |
-02:08:03.4 |
HIP 59979 |
26.57 |
| 2026-09-25 00:00 |
12:17:06.92 |
-02:10:22.4 |
HIP 59979 |
25.18 |
| 2026-09-25 12:00 |
12:17:26.83 |
-02:12:41.4 |
HIP 59979 |
24.94 |
| 2026-09-26 00:00 |
12:17:46.75 |
-02:15:00.4 |
HIP 60077 |
23.78 |
| 2026-09-26 12:00 |
12:18:06.68 |
-02:17:19.5 |
HIP 60077 |
21.28 |
| 2026-09-27 00:00 |
12:18:26.62 |
-02:19:38.6 |
HIP 60077 |
20.03 |
| 2026-09-27 12:00 |
12:18:46.56 |
-02:21:57.8 |
HIP 60077 |
20.23 |
| 2026-09-28 00:00 |
12:19:06.50 |
-02:24:16.9 |
HIP 60077 |
21.87 |
| 2026-09-28 12:00 |
12:19:26.45 |
-02:26:36.1 |
HIP 60077 |
24.65 |
| 2026-09-29 00:00 |
12:19:46.41 |
-02:28:55.3 |
HIP 60174 |
27.91 |
| 2026-09-29 12:00 |
12:20:06.37 |
-02:31:14.5 |
HIP 60174 |
24.46 |
| 2026-09-30 00:00 |
12:20:26.33 |
-02:33:33.8 |
HIP 60174 |
21.87 |
| 2026-09-30 12:00 |
12:20:46.30 |
-02:35:53.0 |
HIP 60174 |
20.45 |
| 2026-10-01 00:00 |
12:21:06.26 |
-02:38:12.2 |
HIP 60341 |
20.39 |
| 2026-10-01 12:00 |
12:21:26.23 |
-02:40:31.5 |
HIP 60341 |
14.89 |
| 2026-10-02 00:00 |
12:21:46.20 |
-02:42:50.7 |
HIP 60341 |
9.39 |
| 2026-10-02 12:00 |
12:22:06.17 |
-02:45:10.0 |
HIP 60341 |
3.89 |
| 2026-10-03 00:00 |
12:22:26.14 |
-02:47:29.2 |
HIP 60341 |
1.64 |
| 2026-10-03 12:00 |
12:22:46.11 |
-02:49:48.4 |
HIP 60341 |
7.12 |
| 2026-10-04 00:00 |
12:23:06.08 |
-02:52:07.6 |
HIP 60341 |
12.62 |
| 2026-10-04 12:00 |
12:23:26.05 |
-02:54:26.7 |
HIP 60341 |
18.12 |
| 2026-10-05 00:00 |
12:23:46.01 |
-02:56:45.9 |
HIP 60341 |
23.61 |
| 2026-10-05 12:00 |
12:24:05.98 |
-02:59:05.0 |
HIP 60341 |
29.11 |
| 2026-10-06 00:00 |
12:24:25.93 |
-03:01:24.0 |
HIP 60341 |
34.61 |
| 2026-10-06 12:00 |
12:24:45.88 |
-03:03:43.1 |
HIP 60757 |
38.50 |
| 2026-10-07 00:00 |
12:25:05.83 |
-03:06:02.0 |
HIP 60757 |
33.03 |
| 2026-10-07 12:00 |
12:25:25.77 |
-03:08:21.0 |
HIP 60757 |
27.56 |
| 2026-10-08 00:00 |
12:25:45.71 |
-03:10:39.8 |
HIP 60757 |
22.12 |
| 2026-10-08 12:00 |
12:26:05.63 |
-03:12:58.7 |
HIP 60757 |
16.69 |
| 2026-10-09 00:00 |
12:26:25.55 |
-03:15:17.4 |
HIP 60757 |
11.34 |
| 2026-10-09 12:00 |
12:26:45.46 |
-03:17:36.1 |
HIP 60757 |
6.21 |
| 2026-10-10 00:00 |
12:27:05.36 |
-03:19:54.7 |
HIP 60757 |
2.93 |
| 2026-10-10 12:00 |
12:27:25.25 |
-03:22:13.2 |
HIP 60757 |
6.22 |
| 2026-10-11 00:00 |
12:27:45.13 |
-03:24:31.6 |
HIP 60757 |
11.34 |