메타데이터
| 항목 |
값 |
| Designation |
P/2007 S1 (Zhao) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-12-06T20:05:23.029440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:12Z |
| Obs used |
78 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-09-29.0000000 |
| e |
0.34338434 |
| q (au) |
2.494391 |
| a (au) |
3.798860 |
| i (deg) |
5.973039 |
| Ω (om, deg) |
141.618584 |
| ω (w, deg) |
245.425020 |
| M (ma, deg) |
350.836814 |
밝기
산란 + 전체 선형
$$
M_a = (10.896 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.896 |
| n |
6.000 |
| gf |
0.870 |
| gb |
-0.881 |
| k |
1.000 |
| δ90 |
2.896 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
13:35:37.05 |
-03:14:48.8 |
HIP 66369 |
21.20 |
| 2026-03-26 12:00 |
13:35:21.91 |
-03:12:55.5 |
HIP 66369 |
21.82 |
| 2026-03-27 00:00 |
13:35:06.67 |
-03:11:02.1 |
HIP 66369 |
23.22 |
| 2026-03-27 12:00 |
13:34:51.34 |
-03:09:08.5 |
HIP 66369 |
25.28 |
| 2026-03-28 00:00 |
13:34:35.92 |
-03:07:14.7 |
HIP 66369 |
27.87 |
| 2026-03-28 12:00 |
13:34:20.42 |
-03:05:20.8 |
HIP 66369 |
30.86 |
| 2026-03-29 00:00 |
13:34:04.83 |
-03:03:26.8 |
HIP 66024 |
28.53 |
| 2026-03-29 12:00 |
13:33:49.16 |
-03:01:32.7 |
HIP 66024 |
24.91 |
| 2026-03-30 00:00 |
13:33:33.41 |
-02:59:38.5 |
HIP 66024 |
21.54 |
| 2026-03-30 12:00 |
13:33:17.58 |
-02:57:44.2 |
HIP 66024 |
18.58 |
| 2026-03-31 00:00 |
13:33:01.68 |
-02:55:49.8 |
HIP 66024 |
16.26 |
| 2026-03-31 12:00 |
13:32:45.70 |
-02:53:55.5 |
HIP 66024 |
14.90 |
| 2026-04-01 00:00 |
13:32:29.66 |
-02:52:01.1 |
HIP 66024 |
14.78 |
| 2026-04-01 12:00 |
13:32:13.56 |
-02:50:06.7 |
HIP 66024 |
15.94 |
| 2026-04-02 00:00 |
13:31:57.38 |
-02:48:12.3 |
HIP 65934 |
14.05 |
| 2026-04-02 12:00 |
13:31:41.15 |
-02:46:18.0 |
HIP 65934 |
10.33 |
| 2026-04-03 00:00 |
13:31:24.86 |
-02:44:23.7 |
HIP 65934 |
7.49 |
| 2026-04-03 12:00 |
13:31:08.51 |
-02:42:29.4 |
HIP 65934 |
6.76 |
| 2026-04-04 00:00 |
13:30:52.11 |
-02:40:35.3 |
HIP 65934 |
8.72 |
| 2026-04-04 12:00 |
13:30:35.66 |
-02:38:41.2 |
HIP 65934 |
12.13 |
| 2026-04-05 00:00 |
13:30:19.17 |
-02:36:47.3 |
HIP 65934 |
16.11 |
| 2026-04-05 12:00 |
13:30:02.62 |
-02:34:53.6 |
HIP 65934 |
20.33 |
| 2026-04-06 00:00 |
13:29:46.04 |
-02:33:00.0 |
HIP 65714 |
24.13 |
| 2026-04-06 12:00 |
13:29:29.41 |
-02:31:06.5 |
HIP 65714 |
19.58 |
| 2026-04-07 00:00 |
13:29:12.75 |
-02:29:13.2 |
HIP 65714 |
15.03 |
| 2026-04-07 12:00 |
13:28:56.06 |
-02:27:20.2 |
HIP 65714 |
10.50 |
| 2026-04-08 00:00 |
13:28:39.33 |
-02:25:27.4 |
HIP 65714 |
6.02 |
| 2026-04-08 12:00 |
13:28:22.57 |
-02:23:34.8 |
HIP 65714 |
2.07 |
| 2026-04-09 00:00 |
13:28:05.79 |
-02:21:42.5 |
HIP 65714 |
3.80 |
| 2026-04-09 12:00 |
13:27:48.99 |
-02:19:50.4 |
HIP 65714 |
8.17 |
| 2026-04-10 00:00 |
13:27:32.16 |
-02:17:58.7 |
HIP 65714 |
12.71 |
| 2026-04-10 12:00 |
13:27:15.32 |
-02:16:07.3 |
HIP 65714 |
17.28 |
| 2026-04-11 00:00 |
13:26:58.47 |
-02:14:16.2 |
HIP 65714 |
21.86 |
| 2026-04-11 12:00 |
13:26:41.60 |
-02:12:25.5 |
HIP 65478 |
21.96 |
| 2026-04-12 00:00 |
13:26:24.72 |
-02:10:35.2 |
HIP 65478 |
17.96 |
| 2026-04-12 12:00 |
13:26:07.84 |
-02:08:45.2 |
HIP 65478 |
14.32 |
| 2026-04-13 00:00 |
13:25:50.96 |
-02:06:55.7 |
HIP 65478 |
11.39 |
| 2026-04-13 12:00 |
13:25:34.07 |
-02:05:06.6 |
HIP 65478 |
9.82 |
| 2026-04-14 00:00 |
13:25:17.19 |
-02:03:17.9 |
HIP 65478 |
10.25 |
| 2026-04-14 12:00 |
13:25:00.32 |
-02:01:29.7 |
HIP 65399 |
12.43 |
| 2026-04-15 00:00 |
13:24:43.45 |
-01:59:42.0 |
HIP 65399 |
9.86 |
| 2026-04-15 12:00 |
13:24:26.60 |
-01:57:54.8 |
HIP 65399 |
9.03 |
| 2026-04-16 00:00 |
13:24:09.76 |
-01:56:08.1 |
HIP 65399 |
10.38 |