메타데이터
| 항목 |
값 |
| Designation |
79P/du Toit-Hartley |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-05-28T09:52:27.811200Z |
| Orbit solution date (soln_date, UTC) |
2021-05-04T14:20:50Z |
| Obs used |
215 |
| NEO |
Yes |
| M1 |
17.400 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-10-18.0000000 |
| e |
0.59408527 |
| q (au) |
1.230504 |
| a (au) |
3.031435 |
| i (deg) |
2.893178 |
| Ω (om, deg) |
307.838646 |
| ω (w, deg) |
253.269688 |
| M (ma, deg) |
318.280693 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-03-26 00:00 |
01:04:42.78 |
+09:40:14.4 |
HIP 5048 |
5.18 |
| 2026-03-26 12:00 |
01:05:07.16 |
+09:42:39.0 |
HIP 5048 |
10.30 |
| 2026-03-27 00:00 |
01:05:31.56 |
+09:45:03.7 |
HIP 5048 |
16.41 |
| 2026-03-27 12:00 |
01:05:55.98 |
+09:47:28.6 |
HIP 5048 |
22.73 |
| 2026-03-28 00:00 |
01:06:20.43 |
+09:49:53.5 |
HIP 5048 |
29.12 |
| 2026-03-28 12:00 |
01:06:44.89 |
+09:52:18.6 |
HIP 5344 |
23.98 |
| 2026-03-29 00:00 |
01:07:09.37 |
+09:54:43.7 |
HIP 5344 |
17.85 |
| 2026-03-29 12:00 |
01:07:33.88 |
+09:57:09.0 |
HIP 5344 |
12.11 |
| 2026-03-30 00:00 |
01:07:58.40 |
+09:59:34.4 |
HIP 5344 |
7.69 |
| 2026-03-30 12:00 |
01:08:22.94 |
+10:01:59.8 |
HIP 5344 |
7.51 |
| 2026-03-31 00:00 |
01:08:47.50 |
+10:04:25.3 |
HIP 5344 |
11.77 |
| 2026-03-31 12:00 |
01:09:12.07 |
+10:06:50.9 |
HIP 5344 |
17.48 |
| 2026-04-01 00:00 |
01:09:36.67 |
+10:09:16.6 |
HIP 5344 |
23.62 |
| 2026-04-01 12:00 |
01:10:01.28 |
+10:11:42.4 |
HIP 5575 |
22.34 |
| 2026-04-02 00:00 |
01:10:25.90 |
+10:14:08.2 |
HIP 5575 |
15.88 |
| 2026-04-02 12:00 |
01:10:50.54 |
+10:16:34.1 |
HIP 5575 |
9.50 |
| 2026-04-03 00:00 |
01:11:15.20 |
+10:19:00.1 |
HIP 5575 |
3.70 |
| 2026-04-03 12:00 |
01:11:39.87 |
+10:21:26.1 |
HIP 5575 |
4.75 |
| 2026-04-04 00:00 |
01:12:04.55 |
+10:23:52.2 |
HIP 5575 |
10.82 |
| 2026-04-04 12:00 |
01:12:29.25 |
+10:26:18.3 |
HIP 5662 |
9.53 |
| 2026-04-05 00:00 |
01:12:53.96 |
+10:28:44.5 |
HIP 5662 |
6.52 |
| 2026-04-05 12:00 |
01:13:18.68 |
+10:31:10.7 |
HIP 5662 |
8.93 |
| 2026-04-06 00:00 |
01:13:43.42 |
+10:33:37.0 |
HIP 5662 |
14.25 |
| 2026-04-06 12:00 |
01:14:08.16 |
+10:36:03.3 |
HIP 5870 |
18.47 |
| 2026-04-07 00:00 |
01:14:32.92 |
+10:38:29.6 |
HIP 5870 |
12.02 |
| 2026-04-07 12:00 |
01:14:57.69 |
+10:40:56.0 |
HIP 5870 |
5.81 |
| 2026-04-08 00:00 |
01:15:22.46 |
+10:43:22.4 |
HIP 5870 |
3.00 |
| 2026-04-08 12:00 |
01:15:47.25 |
+10:45:48.8 |
HIP 5870 |
8.38 |
| 2026-04-09 00:00 |
01:16:12.04 |
+10:48:15.2 |
HIP 5870 |
14.75 |
| 2026-04-09 12:00 |
01:16:36.84 |
+10:50:41.6 |
HIP 6003 |
17.42 |
| 2026-04-10 00:00 |
01:17:01.65 |
+10:53:08.0 |
HIP 6003 |
17.58 |
| 2026-04-10 12:00 |
01:17:26.47 |
+10:55:34.5 |
HIP 6003 |
20.02 |
| 2026-04-11 00:00 |
01:17:51.29 |
+10:58:00.9 |
HIP 6003 |
24.06 |
| 2026-04-11 12:00 |
01:18:16.12 |
+11:00:27.3 |
HIP 6212 |
20.69 |
| 2026-04-12 00:00 |
01:18:40.96 |
+11:02:53.8 |
HIP 6212 |
15.37 |
| 2026-04-12 12:00 |
01:19:05.79 |
+11:05:20.2 |
HIP 6212 |
11.43 |
| 2026-04-13 00:00 |
01:19:30.64 |
+11:07:46.5 |
HIP 6212 |
10.54 |
| 2026-04-13 12:00 |
01:19:55.48 |
+11:10:12.9 |
HIP 6212 |
13.34 |
| 2026-04-14 00:00 |
01:20:20.33 |
+11:12:39.2 |
HIP 6298 |
16.41 |
| 2026-04-14 12:00 |
01:20:45.18 |
+11:15:05.5 |
HIP 6298 |
12.43 |
| 2026-04-15 00:00 |
01:21:10.03 |
+11:17:31.8 |
HIP 6298 |
11.22 |
| 2026-04-15 12:00 |
01:21:34.88 |
+11:19:58.0 |
HIP 6334 |
12.83 |
| 2026-04-16 00:00 |
01:21:59.74 |
+11:22:24.2 |
HIP 6451 |
13.20 |