메타데이터
| 항목 |
값 |
| Designation |
213P/Van Ness |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-09-24T09:09:50.725440Z |
| Orbit solution date (soln_date, UTC) |
2025-04-11T15:15:55Z |
| Obs used |
367 |
| NEO |
- |
| M1 |
10.800 |
| K1 |
16.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-02-12.0000000 |
| e |
0.40755795 |
| q (au) |
1.983344 |
| a (au) |
3.347744 |
| i (deg) |
10.377842 |
| Ω (om, deg) |
311.315921 |
| ω (w, deg) |
5.559827 |
| M (ma, deg) |
22.626485 |
밝기
산란 + 전체 선형
$$
M_a = (18.184 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.184 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-0.598 |
| 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) |
| 2026-09-20 00:00 |
09:24:12.55 |
+15:04:14.3 |
HIP 46318 |
35.81 |
| 2026-09-20 12:00 |
09:24:35.57 |
+15:02:02.9 |
HIP 46318 |
30.55 |
| 2026-09-21 00:00 |
09:24:58.52 |
+14:59:51.6 |
HIP 46318 |
25.62 |
| 2026-09-21 12:00 |
09:25:21.39 |
+14:57:40.5 |
HIP 46318 |
21.24 |
| 2026-09-22 00:00 |
09:25:44.17 |
+14:55:29.5 |
HIP 46339 |
15.76 |
| 2026-09-22 12:00 |
09:26:06.88 |
+14:53:18.7 |
HIP 46339 |
10.54 |
| 2026-09-23 00:00 |
09:26:29.50 |
+14:51:08.0 |
HIP 46339 |
6.62 |
| 2026-09-23 12:00 |
09:26:52.03 |
+14:48:57.6 |
HIP 46339 |
6.76 |
| 2026-09-24 00:00 |
09:27:14.49 |
+14:46:47.3 |
HIP 46339 |
10.77 |
| 2026-09-24 12:00 |
09:27:36.85 |
+14:44:37.2 |
HIP 46339 |
15.94 |
| 2026-09-25 00:00 |
09:27:59.13 |
+14:42:27.3 |
HIP 46335 |
21.39 |
| 2026-09-25 12:00 |
09:28:21.33 |
+14:40:17.6 |
HIP 46525 |
17.69 |
| 2026-09-26 00:00 |
09:28:43.44 |
+14:38:08.0 |
HIP 46525 |
12.09 |
| 2026-09-26 12:00 |
09:29:05.46 |
+14:35:58.7 |
HIP 46525 |
6.79 |
| 2026-09-27 00:00 |
09:29:27.39 |
+14:33:49.6 |
HIP 46525 |
3.47 |
| 2026-09-27 12:00 |
09:29:49.24 |
+14:31:40.7 |
HIP 46525 |
6.58 |
| 2026-09-28 00:00 |
09:30:10.99 |
+14:29:32.1 |
HIP 46525 |
11.80 |
| 2026-09-28 12:00 |
09:30:32.66 |
+14:27:23.6 |
HIP 46525 |
17.29 |
| 2026-09-29 00:00 |
09:30:54.23 |
+14:25:15.4 |
HIP 46525 |
22.85 |
| 2026-09-29 12:00 |
09:31:15.71 |
+14:23:07.4 |
HIP 46864 |
24.75 |
| 2026-09-30 00:00 |
09:31:37.10 |
+14:20:59.6 |
HIP 46864 |
19.84 |
| 2026-09-30 12:00 |
09:31:58.40 |
+14:18:52.1 |
HIP 46864 |
15.43 |
| 2026-10-01 00:00 |
09:32:19.60 |
+14:16:44.8 |
HIP 46864 |
12.04 |
| 2026-10-01 12:00 |
09:32:40.71 |
+14:14:37.8 |
HIP 46864 |
10.66 |
| 2026-10-02 00:00 |
09:33:01.72 |
+14:12:31.0 |
HIP 46864 |
11.98 |
| 2026-10-02 12:00 |
09:33:22.64 |
+14:10:24.5 |
HIP 46864 |
15.28 |
| 2026-10-03 00:00 |
09:33:43.45 |
+14:08:18.3 |
HIP 46864 |
19.58 |
| 2026-10-03 12:00 |
09:34:04.17 |
+14:06:12.3 |
HIP 47035 |
15.93 |
| 2026-10-04 00:00 |
09:34:24.79 |
+14:04:06.6 |
HIP 47035 |
10.85 |
| 2026-10-04 12:00 |
09:34:45.32 |
+14:02:01.3 |
HIP 47035 |
6.39 |
| 2026-10-05 00:00 |
09:35:05.74 |
+13:59:56.2 |
HIP 47035 |
4.69 |
| 2026-10-05 12:00 |
09:35:26.05 |
+13:57:51.4 |
HIP 47035 |
7.79 |
| 2026-10-06 00:00 |
09:35:46.27 |
+13:55:46.9 |
HIP 47035 |
12.50 |
| 2026-10-06 12:00 |
09:36:06.38 |
+13:53:42.7 |
HIP 47038 |
17.44 |
| 2026-10-07 00:00 |
09:36:26.39 |
+13:51:38.9 |
HIP 47038 |
22.53 |
| 2026-10-07 12:00 |
09:36:46.29 |
+13:49:35.3 |
HIP 47038 |
27.66 |
| 2026-10-08 00:00 |
09:37:06.08 |
+13:47:32.1 |
HIP 47149 |
30.11 |
| 2026-10-08 12:00 |
09:37:25.77 |
+13:45:29.3 |
HIP 47149 |
30.12 |
| 2026-10-09 00:00 |
09:37:45.34 |
+13:43:26.8 |
HIP 47149 |
31.01 |
| 2026-10-09 12:00 |
09:38:04.81 |
+13:41:24.6 |
HIP 47388 |
28.70 |
| 2026-10-10 00:00 |
09:38:24.17 |
+13:39:22.8 |
HIP 47388 |
24.33 |
| 2026-10-10 12:00 |
09:38:43.42 |
+13:37:21.4 |
HIP 47388 |
20.34 |
| 2026-10-11 00:00 |
09:39:02.55 |
+13:35:20.3 |
HIP 47388 |
16.97 |