메타데이터
| 항목 |
값 |
| Designation |
168P/Hergenrother |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-10-01T22:24:03.841920Z |
| Orbit solution date (soln_date, UTC) |
2025-11-21T13:43:00Z |
| Obs used |
3377 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
44.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-10-05.0000000 |
| e |
0.60947452 |
| q (au) |
1.415279 |
| a (au) |
3.624038 |
| i (deg) |
21.929366 |
| Ω (om, deg) |
356.477671 |
| ω (w, deg) |
13.919130 |
| M (ma, deg) |
308.150819 |
밝기
산란 + 전체 선형
$$
M_a = (14.192 + 5.655\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.192 |
| n |
5.655 |
| gf |
0.917 |
| gb |
-0.534 |
| k |
0.991 |
| δ90 |
3.771 |
| 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 |
08:11:52.05 |
+39:26:29.0 |
HIP 40224 |
12.28 |
| 2026-09-20 12:00 |
08:13:00.96 |
+39:25:57.0 |
HIP 40224 |
2.71 |
| 2026-09-21 00:00 |
08:14:09.50 |
+39:25:24.6 |
HIP 40224 |
14.71 |
| 2026-09-21 12:00 |
08:15:17.67 |
+39:24:51.7 |
HIP 40319 |
27.36 |
| 2026-09-22 00:00 |
08:16:25.46 |
+39:24:18.5 |
HIP 40729 |
33.22 |
| 2026-09-22 12:00 |
08:17:32.87 |
+39:23:45.0 |
HIP 40729 |
24.28 |
| 2026-09-23 00:00 |
08:18:39.90 |
+39:23:11.2 |
HIP 40788 |
15.80 |
| 2026-09-23 12:00 |
08:19:46.55 |
+39:22:37.1 |
HIP 40788 |
13.50 |
| 2026-09-24 00:00 |
08:20:52.83 |
+39:22:02.8 |
HIP 40946 |
5.99 |
| 2026-09-24 12:00 |
08:21:58.73 |
+39:21:28.4 |
HIP 40946 |
7.15 |
| 2026-09-25 00:00 |
08:23:04.25 |
+39:20:53.7 |
HIP 40946 |
19.71 |
| 2026-09-25 12:00 |
08:24:09.39 |
+39:20:19.0 |
HIP 41220 |
11.18 |
| 2026-09-26 00:00 |
08:25:14.14 |
+39:19:44.1 |
HIP 41272 |
5.29 |
| 2026-09-26 12:00 |
08:26:18.52 |
+39:19:09.2 |
HIP 41272 |
13.40 |
| 2026-09-27 00:00 |
08:27:22.52 |
+39:18:34.3 |
HIP 41382 |
18.35 |
| 2026-09-27 12:00 |
08:28:26.14 |
+39:17:59.5 |
HIP 41713 |
22.99 |
| 2026-09-28 00:00 |
08:29:29.37 |
+39:17:24.6 |
HIP 41713 |
11.43 |
| 2026-09-28 12:00 |
08:30:32.22 |
+39:16:49.9 |
HIP 41713 |
5.66 |
| 2026-09-29 00:00 |
08:31:34.69 |
+39:16:15.3 |
HIP 41830 |
5.38 |
| 2026-09-29 12:00 |
08:32:36.78 |
+39:15:40.9 |
HIP 41830 |
12.39 |
| 2026-09-30 00:00 |
08:33:38.47 |
+39:15:06.6 |
HIP 41990 |
19.47 |
| 2026-09-30 12:00 |
08:34:39.79 |
+39:14:32.6 |
HIP 41990 |
23.03 |
| 2026-10-01 00:00 |
08:35:40.72 |
+39:13:58.8 |
HIP 42237 |
16.05 |
| 2026-10-01 12:00 |
08:36:41.26 |
+39:13:25.4 |
HIP 42231 |
11.14 |
| 2026-10-02 00:00 |
08:37:41.41 |
+39:12:52.3 |
HIP 42231 |
16.23 |
| 2026-10-02 12:00 |
08:38:41.18 |
+39:12:19.5 |
HIP 42231 |
25.92 |
| 2026-10-03 00:00 |
08:39:40.55 |
+39:11:47.2 |
HIP 42686 |
27.21 |
| 2026-10-03 12:00 |
08:40:39.53 |
+39:11:15.3 |
HIP 42686 |
15.79 |
| 2026-10-04 00:00 |
08:41:38.12 |
+39:10:43.9 |
HIP 42686 |
4.58 |
| 2026-10-04 12:00 |
08:42:36.32 |
+39:10:13.0 |
HIP 42744 |
6.61 |
| 2026-10-05 00:00 |
08:43:34.12 |
+39:09:42.6 |
HIP 42744 |
11.81 |
| 2026-10-05 12:00 |
08:44:31.53 |
+39:09:12.8 |
HIP 42744 |
22.00 |
| 2026-10-06 00:00 |
08:45:28.54 |
+39:08:43.6 |
HIP 42744 |
32.75 |
| 2026-10-06 12:00 |
08:46:25.15 |
+39:08:15.1 |
HIP 43198 |
33.27 |
| 2026-10-07 00:00 |
08:47:21.37 |
+39:07:47.2 |
HIP 43198 |
29.11 |
| 2026-10-07 12:00 |
08:48:17.18 |
+39:07:20.1 |
HIP 43198 |
28.68 |
| 2026-10-08 00:00 |
08:49:12.59 |
+39:06:53.7 |
HIP 43367 |
29.93 |
| 2026-10-08 12:00 |
08:50:07.60 |
+39:06:28.0 |
HIP 43522 |
23.60 |
| 2026-10-09 00:00 |
08:51:02.20 |
+39:06:03.2 |
HIP 43522 |
15.17 |
| 2026-10-09 12:00 |
08:51:56.40 |
+39:05:39.2 |
HIP 43522 |
11.37 |
| 2026-10-10 00:00 |
08:52:50.19 |
+39:05:16.0 |
HIP 43522 |
15.78 |
| 2026-10-10 12:00 |
08:53:43.58 |
+39:04:53.8 |
HIP 43714 |
11.52 |
| 2026-10-11 00:00 |
08:54:36.56 |
+39:04:32.4 |
HIP 43714 |
11.97 |