메타데이터
| 항목 |
값 |
| Designation |
97P/Metcalf-Brewington |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-02-20T14:52:28.525440Z |
| Orbit solution date (soln_date, UTC) |
2024-04-18T00:13:54Z |
| Obs used |
391 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
7.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-04-13.0000000 |
| e |
0.45694184 |
| q (au) |
2.606598 |
| a (au) |
4.799850 |
| i (deg) |
17.860186 |
| Ω (om, deg) |
185.170868 |
| ω (w, deg) |
228.218375 |
| M (ma, deg) |
193.671045 |
밝기
산란 + 전체 선형
$$
M_a = (12.502 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.502 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.635 |
| k |
0.800 |
| δ90 |
10.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
14:18:53.57 |
-01:57:07.6 |
HIP 69997 |
11.69 |
| 2026-07-29 12:00 |
14:18:58.27 |
-01:58:04.1 |
HIP 69997 |
10.21 |
| 2026-07-30 00:00 |
14:19:03.10 |
-01:59:01.2 |
HIP 69997 |
8.71 |
| 2026-07-30 12:00 |
14:19:08.05 |
-01:59:58.9 |
HIP 69997 |
7.20 |
| 2026-07-31 00:00 |
14:19:13.12 |
-02:00:57.1 |
HIP 69997 |
5.70 |
| 2026-07-31 12:00 |
14:19:18.32 |
-02:01:55.9 |
HIP 69997 |
4.26 |
| 2026-08-01 00:00 |
14:19:23.64 |
-02:02:55.2 |
HIP 69997 |
2.99 |
| 2026-08-01 12:00 |
14:19:29.08 |
-02:03:55.0 |
HIP 69997 |
2.30 |
| 2026-08-02 00:00 |
14:19:34.64 |
-02:04:55.3 |
HIP 69997 |
2.73 |
| 2026-08-02 12:00 |
14:19:40.33 |
-02:05:56.2 |
HIP 69997 |
3.97 |
| 2026-08-03 00:00 |
14:19:46.13 |
-02:06:57.5 |
HIP 69997 |
5.52 |
| 2026-08-03 12:00 |
14:19:52.06 |
-02:07:59.4 |
HIP 69997 |
7.21 |
| 2026-08-04 00:00 |
14:19:58.10 |
-02:09:01.8 |
HIP 69997 |
8.97 |
| 2026-08-04 12:00 |
14:20:04.27 |
-02:10:04.7 |
HIP 70012 |
9.84 |
| 2026-08-05 00:00 |
14:20:10.55 |
-02:11:08.1 |
HIP 70012 |
10.63 |
| 2026-08-05 12:00 |
14:20:16.95 |
-02:12:12.0 |
HIP 70012 |
11.70 |
| 2026-08-06 00:00 |
14:20:23.48 |
-02:13:16.3 |
HIP 70012 |
12.99 |
| 2026-08-06 12:00 |
14:20:30.11 |
-02:14:21.2 |
HIP 70012 |
14.47 |
| 2026-08-07 00:00 |
14:20:36.87 |
-02:15:26.5 |
HIP 70012 |
16.08 |
| 2026-08-07 12:00 |
14:20:43.75 |
-02:16:32.2 |
HIP 70188 |
14.40 |
| 2026-08-08 00:00 |
14:20:50.74 |
-02:17:38.5 |
HIP 70188 |
12.34 |
| 2026-08-08 12:00 |
14:20:57.84 |
-02:18:45.2 |
HIP 70188 |
10.26 |
| 2026-08-09 00:00 |
14:21:05.07 |
-02:19:52.4 |
HIP 70188 |
8.15 |
| 2026-08-09 12:00 |
14:21:12.41 |
-02:21:00.0 |
HIP 70188 |
6.03 |
| 2026-08-10 00:00 |
14:21:19.86 |
-02:22:08.0 |
HIP 70188 |
3.90 |
| 2026-08-10 12:00 |
14:21:27.43 |
-02:23:16.5 |
HIP 70188 |
1.89 |
| 2026-08-11 00:00 |
14:21:35.12 |
-02:24:25.4 |
HIP 70188 |
1.29 |
| 2026-08-11 12:00 |
14:21:42.91 |
-02:25:34.8 |
HIP 70188 |
3.15 |
| 2026-08-12 00:00 |
14:21:50.83 |
-02:26:44.5 |
HIP 70188 |
5.36 |
| 2026-08-12 12:00 |
14:21:58.85 |
-02:27:54.7 |
HIP 70188 |
7.64 |
| 2026-08-13 00:00 |
14:22:06.99 |
-02:29:05.3 |
HIP 70188 |
9.97 |
| 2026-08-13 12:00 |
14:22:15.24 |
-02:30:16.3 |
HIP 70188 |
12.33 |
| 2026-08-14 00:00 |
14:22:23.60 |
-02:31:27.6 |
HIP 70188 |
14.72 |
| 2026-08-14 12:00 |
14:22:32.07 |
-02:32:39.4 |
HIP 70188 |
17.15 |
| 2026-08-15 00:00 |
14:22:40.65 |
-02:33:51.5 |
HIP 70309 |
19.34 |
| 2026-08-15 12:00 |
14:22:49.34 |
-02:35:04.1 |
HIP 70309 |
17.55 |
| 2026-08-16 00:00 |
14:22:58.14 |
-02:36:17.0 |
HIP 70309 |
15.93 |
| 2026-08-16 12:00 |
14:23:07.05 |
-02:37:30.2 |
HIP 70309 |
14.57 |
| 2026-08-17 00:00 |
14:23:16.06 |
-02:38:43.9 |
HIP 70309 |
13.54 |
| 2026-08-17 12:00 |
14:23:25.18 |
-02:39:57.8 |
HIP 70309 |
12.96 |
| 2026-08-18 00:00 |
14:23:34.41 |
-02:41:12.1 |
HIP 70309 |
12.89 |
| 2026-08-18 12:00 |
14:23:43.75 |
-02:42:26.8 |
HIP 70309 |
13.35 |
| 2026-08-19 00:00 |
14:23:53.19 |
-02:43:41.8 |
HIP 70309 |
14.32 |