메타데이터
| 항목 |
값 |
| Designation |
175P/Hergenrother |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-05-22T23:00:09.181440Z |
| Orbit solution date (soln_date, UTC) |
2026-04-27T13:42:31Z |
| Obs used |
924 |
| NEO |
- |
| M1 |
10.200 |
| K1 |
20.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-02-26.0000000 |
| e |
0.43268420 |
| q (au) |
1.949246 |
| a (au) |
3.435910 |
| i (deg) |
6.069495 |
| Ω (om, deg) |
123.690044 |
| ω (w, deg) |
55.625115 |
| M (ma, deg) |
290.057709 |
밝기
산란 + 전체 선형
$$
M_a = (12.033 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.033 |
| n |
6.000 |
| gf |
0.972 |
| gb |
-0.890 |
| k |
1.000 |
| δ90 |
9.437 |
| 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) |
| 2026-09-20 00:00 |
12:26:59.84 |
+00:47:20.1 |
HIP 60688 |
19.65 |
| 2026-09-20 12:00 |
12:27:57.84 |
+00:41:09.3 |
HIP 60688 |
27.25 |
| 2026-09-21 00:00 |
12:28:55.85 |
+00:34:58.6 |
HIP 61030 |
23.20 |
| 2026-09-21 12:00 |
12:29:53.86 |
+00:28:48.1 |
HIP 61030 |
10.37 |
| 2026-09-22 00:00 |
12:30:51.89 |
+00:22:37.8 |
HIP 61030 |
13.19 |
| 2026-09-22 12:00 |
12:31:49.93 |
+00:16:27.6 |
HIP 61030 |
27.15 |
| 2026-09-23 00:00 |
12:32:47.98 |
+00:10:17.6 |
HIP 61240 |
26.85 |
| 2026-09-23 12:00 |
12:33:46.05 |
+00:04:07.8 |
HIP 61240 |
23.68 |
| 2026-09-24 00:00 |
12:34:44.12 |
-00:02:01.8 |
HIP 61531 |
29.16 |
| 2026-09-24 12:00 |
12:35:42.20 |
-00:08:11.3 |
HIP 61531 |
13.83 |
| 2026-09-25 00:00 |
12:36:40.29 |
-00:14:20.5 |
HIP 61531 |
5.47 |
| 2026-09-25 12:00 |
12:37:38.40 |
-00:20:29.5 |
HIP 61531 |
19.14 |
| 2026-09-26 00:00 |
12:38:36.51 |
-00:26:38.2 |
HIP 61805 |
21.52 |
| 2026-09-26 12:00 |
12:39:34.64 |
-00:32:46.7 |
HIP 61805 |
6.45 |
| 2026-09-27 00:00 |
12:40:32.77 |
-00:38:55.0 |
HIP 61899 |
7.89 |
| 2026-09-27 12:00 |
12:41:30.92 |
-00:45:03.1 |
HIP 61899 |
10.38 |
| 2026-09-28 00:00 |
12:42:29.08 |
-00:51:10.8 |
HIP 61899 |
25.52 |
| 2026-09-28 12:00 |
12:43:27.25 |
-00:57:18.3 |
HIP 62166 |
35.19 |
| 2026-09-29 00:00 |
12:44:25.44 |
-01:03:25.6 |
HIP 62166 |
25.95 |
| 2026-09-29 12:00 |
12:45:23.63 |
-01:09:32.5 |
HIP 62166 |
24.62 |
| 2026-09-30 00:00 |
12:46:21.84 |
-01:15:39.2 |
HIP 62348 |
26.49 |
| 2026-09-30 12:00 |
12:47:20.06 |
-01:21:45.5 |
HIP 62549 |
25.88 |
| 2026-10-01 00:00 |
12:48:18.29 |
-01:27:51.5 |
HIP 62549 |
10.17 |
| 2026-10-01 12:00 |
12:49:16.53 |
-01:33:57.3 |
HIP 62549 |
5.95 |
| 2026-10-02 00:00 |
12:50:14.78 |
-01:40:02.7 |
HIP 62664 |
9.73 |
| 2026-10-02 12:00 |
12:51:13.05 |
-01:46:07.7 |
HIP 62664 |
12.74 |
| 2026-10-03 00:00 |
12:52:11.33 |
-01:52:12.4 |
HIP 62664 |
26.98 |
| 2026-10-03 12:00 |
12:53:09.63 |
-01:58:16.8 |
HIP 62963 |
33.40 |
| 2026-10-04 00:00 |
12:54:07.93 |
-02:04:20.8 |
HIP 63098 |
31.34 |
| 2026-10-04 12:00 |
12:55:06.25 |
-02:10:24.4 |
HIP 63098 |
28.53 |
| 2026-10-05 00:00 |
12:56:04.58 |
-02:16:27.6 |
HIP 63269 |
30.42 |
| 2026-10-05 12:00 |
12:57:02.92 |
-02:22:30.5 |
HIP 63269 |
23.18 |
| 2026-10-06 00:00 |
12:58:01.27 |
-02:28:32.9 |
HIP 63269 |
25.44 |
| 2026-10-06 12:00 |
12:58:59.64 |
-02:34:34.9 |
HIP 63328 |
20.24 |
| 2026-10-07 00:00 |
12:59:58.02 |
-02:40:36.5 |
HIP 63467 |
5.14 |
| 2026-10-07 12:00 |
13:00:56.40 |
-02:46:37.7 |
HIP 63467 |
10.65 |
| 2026-10-08 00:00 |
13:01:54.81 |
-02:52:38.4 |
HIP 63661 |
18.70 |
| 2026-10-08 12:00 |
13:02:53.22 |
-02:58:38.6 |
HIP 63703 |
6.02 |
| 2026-10-09 00:00 |
13:03:51.64 |
-03:04:38.4 |
HIP 63746 |
8.44 |
| 2026-10-09 12:00 |
13:04:50.07 |
-03:10:37.7 |
HIP 63746 |
14.44 |
| 2026-10-10 00:00 |
13:05:48.52 |
-03:16:36.5 |
HIP 63746 |
29.03 |
| 2026-10-10 12:00 |
13:06:46.97 |
-03:22:34.8 |
HIP 64221 |
43.87 |
| 2026-10-11 00:00 |
13:07:45.43 |
-03:28:32.6 |
HIP 64221 |
29.73 |