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) |
| 2026-05-12 00:00 |
11:28:52.87 |
+03:56:34.0 |
HIP 56073 |
14.50 |
| 2026-05-12 12:00 |
11:28:45.51 |
+03:57:04.8 |
HIP 56073 |
16.23 |
| 2026-05-13 00:00 |
11:28:38.34 |
+03:57:34.4 |
HIP 55915 |
14.93 |
| 2026-05-13 12:00 |
11:28:31.35 |
+03:58:02.9 |
HIP 55915 |
13.16 |
| 2026-05-14 00:00 |
11:28:24.54 |
+03:58:30.2 |
HIP 55915 |
11.45 |
| 2026-05-14 12:00 |
11:28:17.92 |
+03:58:56.3 |
HIP 55915 |
9.81 |
| 2026-05-15 00:00 |
11:28:11.49 |
+03:59:21.3 |
HIP 55915 |
8.23 |
| 2026-05-15 12:00 |
11:28:05.24 |
+03:59:45.1 |
HIP 55915 |
6.74 |
| 2026-05-16 00:00 |
11:27:59.18 |
+04:00:07.8 |
HIP 55915 |
5.35 |
| 2026-05-16 12:00 |
11:27:53.30 |
+04:00:29.3 |
HIP 55915 |
4.12 |
| 2026-05-17 00:00 |
11:27:47.61 |
+04:00:49.6 |
HIP 55915 |
3.16 |
| 2026-05-17 12:00 |
11:27:42.11 |
+04:01:08.8 |
HIP 55915 |
2.69 |
| 2026-05-18 00:00 |
11:27:36.79 |
+04:01:26.9 |
HIP 55915 |
2.89 |
| 2026-05-18 12:00 |
11:27:31.65 |
+04:01:43.7 |
HIP 55915 |
3.58 |
| 2026-05-19 00:00 |
11:27:26.70 |
+04:01:59.5 |
HIP 55915 |
4.51 |
| 2026-05-19 12:00 |
11:27:21.94 |
+04:02:14.1 |
HIP 55915 |
5.53 |
| 2026-05-20 00:00 |
11:27:17.36 |
+04:02:27.5 |
HIP 55915 |
6.56 |
| 2026-05-20 12:00 |
11:27:12.97 |
+04:02:39.8 |
HIP 55915 |
7.58 |
| 2026-05-21 00:00 |
11:27:08.76 |
+04:02:50.9 |
HIP 55915 |
8.58 |
| 2026-05-21 12:00 |
11:27:04.73 |
+04:03:00.9 |
HIP 55915 |
9.54 |
| 2026-05-22 00:00 |
11:27:00.89 |
+04:03:09.7 |
HIP 55915 |
10.46 |
| 2026-05-22 12:00 |
11:26:57.23 |
+04:03:17.5 |
HIP 55915 |
11.34 |
| 2026-05-23 00:00 |
11:26:53.75 |
+04:03:24.1 |
HIP 55852 |
11.59 |
| 2026-05-23 12:00 |
11:26:50.46 |
+04:03:29.5 |
HIP 55852 |
11.63 |
| 2026-05-24 00:00 |
11:26:47.35 |
+04:03:33.9 |
HIP 55852 |
11.70 |
| 2026-05-24 12:00 |
11:26:44.41 |
+04:03:37.1 |
HIP 55852 |
11.81 |
| 2026-05-25 00:00 |
11:26:41.66 |
+04:03:39.2 |
HIP 55852 |
11.93 |
| 2026-05-25 12:00 |
11:26:39.09 |
+04:03:40.2 |
HIP 55852 |
12.07 |
| 2026-05-26 00:00 |
11:26:36.70 |
+04:03:40.1 |
HIP 55852 |
12.20 |
| 2026-05-26 12:00 |
11:26:34.49 |
+04:03:38.8 |
HIP 55852 |
12.34 |
| 2026-05-27 00:00 |
11:26:32.46 |
+04:03:36.5 |
HIP 55852 |
12.46 |
| 2026-05-27 12:00 |
11:26:30.61 |
+04:03:33.1 |
HIP 55852 |
12.57 |
| 2026-05-28 00:00 |
11:26:28.93 |
+04:03:28.6 |
HIP 55852 |
12.66 |
| 2026-05-28 12:00 |
11:26:27.43 |
+04:03:23.0 |
HIP 55852 |
12.73 |
| 2026-05-29 00:00 |
11:26:26.11 |
+04:03:16.3 |
HIP 55852 |
12.77 |
| 2026-05-29 12:00 |
11:26:24.96 |
+04:03:08.5 |
HIP 55852 |
12.79 |
| 2026-05-30 00:00 |
11:26:23.99 |
+04:02:59.6 |
HIP 55852 |
12.78 |
| 2026-05-30 12:00 |
11:26:23.20 |
+04:02:49.7 |
HIP 55852 |
12.73 |
| 2026-05-31 00:00 |
11:26:22.57 |
+04:02:38.7 |
HIP 55852 |
12.66 |
| 2026-05-31 12:00 |
11:26:22.13 |
+04:02:26.6 |
HIP 55852 |
12.55 |
| 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 |