메타데이터
| 항목 |
값 |
| Designation |
37P/Forbes |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-05-04T04:20:40.490880Z |
| Orbit solution date (soln_date, UTC) |
2025-11-23T22:22:59Z |
| Obs used |
1737 |
| NEO |
- |
| M1 |
9.600 |
| K1 |
21.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-07-09.0000000 |
| e |
0.53418886 |
| q (au) |
1.610684 |
| a (au) |
3.457805 |
| i (deg) |
8.956078 |
| Ω (om, deg) |
314.577863 |
| ω (w, deg) |
330.024671 |
| M (ma, deg) |
66.038643 |
밝기
산란 + 전체 선형
$$
M_a = (10.398 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.398 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2024-02-05 |
2024-10-07 |
+32.4582 |
-8.642 |
| 2024-10-07 |
2024-04-20 |
-1.5202 |
+0.726 |
| 2024-04-20 |
2025-01-05 |
+15.9337 |
-5.687 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
05:23:11.39 |
+30:02:08.6 |
HIP 25237 |
14.82 |
| 2026-07-29 12:00 |
05:23:38.08 |
+30:02:48.8 |
HIP 25237 |
11.74 |
| 2026-07-30 00:00 |
05:24:04.66 |
+30:03:28.9 |
HIP 25237 |
11.10 |
| 2026-07-30 12:00 |
05:24:31.14 |
+30:04:08.9 |
HIP 25237 |
13.24 |
| 2026-07-31 00:00 |
05:24:57.51 |
+30:04:48.7 |
HIP 25237 |
17.13 |
| 2026-07-31 12:00 |
05:25:23.77 |
+30:05:28.3 |
HIP 25422 |
12.66 |
| 2026-08-01 00:00 |
05:25:49.93 |
+30:06:07.8 |
HIP 25422 |
8.75 |
| 2026-08-01 12:00 |
05:26:15.98 |
+30:06:47.2 |
HIP 25422 |
7.59 |
| 2026-08-02 00:00 |
05:26:41.91 |
+30:07:26.4 |
HIP 25492 |
7.63 |
| 2026-08-02 12:00 |
05:27:07.74 |
+30:08:05.4 |
HIP 25492 |
4.43 |
| 2026-08-03 00:00 |
05:27:33.45 |
+30:08:44.4 |
HIP 25492 |
6.62 |
| 2026-08-03 12:00 |
05:27:59.05 |
+30:09:23.2 |
HIP 25492 |
11.41 |
| 2026-08-04 00:00 |
05:28:24.54 |
+30:10:01.8 |
HIP 25492 |
16.67 |
| 2026-08-04 12:00 |
05:28:49.92 |
+30:10:40.4 |
HIP 25492 |
22.04 |
| 2026-08-05 00:00 |
05:29:15.17 |
+30:11:18.8 |
HIP 25789 |
20.93 |
| 2026-08-05 12:00 |
05:29:40.31 |
+30:11:57.0 |
HIP 25789 |
16.87 |
| 2026-08-06 00:00 |
05:30:05.33 |
+30:12:35.2 |
HIP 25789 |
13.83 |
| 2026-08-06 12:00 |
05:30:30.24 |
+30:13:13.2 |
HIP 25789 |
12.52 |
| 2026-08-07 00:00 |
05:30:55.02 |
+30:13:51.2 |
HIP 25789 |
13.45 |
| 2026-08-07 12:00 |
05:31:19.68 |
+30:14:29.0 |
HIP 25789 |
16.19 |
| 2026-08-08 00:00 |
05:31:44.22 |
+30:15:06.7 |
HIP 25789 |
20.00 |
| 2026-08-08 12:00 |
05:32:08.64 |
+30:15:44.2 |
HIP 25789 |
24.36 |
| 2026-08-09 00:00 |
05:32:32.93 |
+30:16:21.7 |
HIP 25789 |
29.02 |
| 2026-08-09 12:00 |
05:32:57.09 |
+30:16:59.1 |
HIP 26208 |
28.65 |
| 2026-08-10 00:00 |
05:33:21.13 |
+30:17:36.4 |
HIP 26208 |
23.60 |
| 2026-08-10 12:00 |
05:33:45.04 |
+30:18:13.6 |
HIP 26208 |
18.67 |
| 2026-08-11 00:00 |
05:34:08.82 |
+30:18:50.7 |
HIP 26208 |
13.96 |
| 2026-08-11 12:00 |
05:34:32.47 |
+30:19:27.6 |
HIP 26208 |
9.75 |
| 2026-08-12 00:00 |
05:34:55.98 |
+30:20:04.5 |
HIP 26208 |
6.96 |
| 2026-08-12 12:00 |
05:35:19.37 |
+30:20:41.4 |
HIP 26208 |
7.34 |
| 2026-08-13 00:00 |
05:35:42.62 |
+30:21:18.1 |
HIP 26208 |
10.52 |
| 2026-08-13 12:00 |
05:36:05.73 |
+30:21:54.7 |
HIP 26208 |
14.76 |
| 2026-08-14 00:00 |
05:36:28.71 |
+30:22:31.3 |
HIP 26208 |
19.35 |
| 2026-08-14 12:00 |
05:36:51.55 |
+30:23:07.8 |
HIP 26536 |
23.85 |
| 2026-08-15 00:00 |
05:37:14.25 |
+30:23:44.2 |
HIP 26536 |
18.98 |
| 2026-08-15 12:00 |
05:37:36.81 |
+30:24:20.6 |
HIP 26536 |
14.20 |
| 2026-08-16 00:00 |
05:37:59.23 |
+30:24:56.8 |
HIP 26536 |
9.56 |
| 2026-08-16 12:00 |
05:38:21.51 |
+30:25:33.1 |
HIP 26536 |
5.36 |
| 2026-08-17 00:00 |
05:38:43.64 |
+30:26:09.2 |
HIP 26536 |
3.60 |
| 2026-08-17 12:00 |
05:39:05.63 |
+30:26:45.3 |
HIP 26536 |
6.56 |
| 2026-08-18 00:00 |
05:39:27.48 |
+30:27:21.3 |
HIP 26536 |
10.86 |
| 2026-08-18 12:00 |
05:39:49.18 |
+30:27:57.3 |
HIP 26536 |
15.40 |
| 2026-08-19 00:00 |
05:40:10.73 |
+30:28:33.2 |
HIP 26536 |
19.98 |