메타데이터
| 항목 |
값 |
| Designation |
289P/Blanpain |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-12-20T23:47:39.655680Z |
| Orbit solution date (soln_date, UTC) |
2025-05-23T12:29:45Z |
| Obs used |
356 |
| NEO |
Yes |
| M1 |
22.000 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-09-19.0000000 |
| e |
0.68514009 |
| q (au) |
0.958876 |
| a (au) |
3.045405 |
| i (deg) |
5.897388 |
| Ω (om, deg) |
68.924004 |
| ω (w, deg) |
9.849290 |
| M (ma, deg) |
342.754359 |
밝기
산란 + 전체 선형
$$
M_a = (18.699 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.699 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.504 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
14:21:53.65 |
-12:10:33.5 |
HIP 70281 |
14.62 |
| 2026-07-29 12:00 |
14:22:02.88 |
-12:11:47.8 |
HIP 70281 |
13.45 |
| 2026-07-30 00:00 |
14:22:12.29 |
-12:13:02.9 |
HIP 70281 |
12.68 |
| 2026-07-30 12:00 |
14:22:21.89 |
-12:14:18.8 |
HIP 70281 |
12.41 |
| 2026-07-31 00:00 |
14:22:31.68 |
-12:15:35.5 |
HIP 70281 |
12.70 |
| 2026-07-31 12:00 |
14:22:41.65 |
-12:16:52.9 |
HIP 70281 |
13.56 |
| 2026-08-01 00:00 |
14:22:51.82 |
-12:18:11.1 |
HIP 70281 |
14.90 |
| 2026-08-01 12:00 |
14:23:02.16 |
-12:19:30.1 |
HIP 70281 |
16.63 |
| 2026-08-02 00:00 |
14:23:12.69 |
-12:20:49.8 |
HIP 70281 |
18.67 |
| 2026-08-02 12:00 |
14:23:23.40 |
-12:22:10.3 |
HIP 70432 |
16.44 |
| 2026-08-03 00:00 |
14:23:34.30 |
-12:23:31.4 |
HIP 70432 |
13.61 |
| 2026-08-03 12:00 |
14:23:45.37 |
-12:24:53.4 |
HIP 70432 |
10.82 |
| 2026-08-04 00:00 |
14:23:56.62 |
-12:26:16.0 |
HIP 70432 |
8.15 |
| 2026-08-04 12:00 |
14:24:08.05 |
-12:27:39.3 |
HIP 70432 |
5.85 |
| 2026-08-05 00:00 |
14:24:19.65 |
-12:29:03.4 |
HIP 70432 |
4.63 |
| 2026-08-05 12:00 |
14:24:31.43 |
-12:30:28.1 |
HIP 70432 |
5.36 |
| 2026-08-06 00:00 |
14:24:43.39 |
-12:31:53.6 |
HIP 70432 |
7.55 |
| 2026-08-06 12:00 |
14:24:55.52 |
-12:33:19.7 |
HIP 70432 |
10.35 |
| 2026-08-07 00:00 |
14:25:07.82 |
-12:34:46.5 |
HIP 70432 |
13.41 |
| 2026-08-07 12:00 |
14:25:20.29 |
-12:36:14.0 |
HIP 70432 |
16.62 |
| 2026-08-08 00:00 |
14:25:32.93 |
-12:37:42.1 |
HIP 70432 |
19.92 |
| 2026-08-08 12:00 |
14:25:45.74 |
-12:39:10.9 |
HIP 70634 |
22.33 |
| 2026-08-09 00:00 |
14:25:58.72 |
-12:40:40.3 |
HIP 70634 |
19.00 |
| 2026-08-09 12:00 |
14:26:11.87 |
-12:42:10.4 |
HIP 70634 |
15.71 |
| 2026-08-10 00:00 |
14:26:25.18 |
-12:43:41.1 |
HIP 70634 |
12.53 |
| 2026-08-10 12:00 |
14:26:38.66 |
-12:45:12.5 |
HIP 70634 |
9.61 |
| 2026-08-11 00:00 |
14:26:52.30 |
-12:46:44.5 |
HIP 70634 |
7.33 |
| 2026-08-11 12:00 |
14:27:06.10 |
-12:48:17.0 |
HIP 70634 |
6.48 |
| 2026-08-12 00:00 |
14:27:20.07 |
-12:49:50.2 |
HIP 70634 |
7.62 |
| 2026-08-12 12:00 |
14:27:34.20 |
-12:51:24.0 |
HIP 70634 |
10.14 |
| 2026-08-13 00:00 |
14:27:48.48 |
-12:52:58.4 |
HIP 70634 |
13.31 |
| 2026-08-13 12:00 |
14:28:02.93 |
-12:54:33.4 |
HIP 70634 |
16.79 |
| 2026-08-14 00:00 |
14:28:17.53 |
-12:56:08.9 |
HIP 70634 |
20.45 |
| 2026-08-14 12:00 |
14:28:32.29 |
-12:57:45.0 |
HIP 70634 |
24.22 |
| 2026-08-15 00:00 |
14:28:47.20 |
-12:59:21.7 |
HIP 70714 |
26.82 |
| 2026-08-15 12:00 |
14:29:02.26 |
-13:00:58.9 |
HIP 70714 |
27.82 |
| 2026-08-16 00:00 |
14:29:17.48 |
-13:02:36.6 |
HIP 70714 |
29.36 |
| 2026-08-16 12:00 |
14:29:32.85 |
-13:04:14.9 |
HIP 70714 |
31.38 |
| 2026-08-17 00:00 |
14:29:48.37 |
-13:05:53.7 |
HIP 71044 |
29.41 |
| 2026-08-17 12:00 |
14:30:04.03 |
-13:07:33.0 |
HIP 71044 |
25.37 |
| 2026-08-18 00:00 |
14:30:19.85 |
-13:09:12.9 |
HIP 71044 |
21.33 |
| 2026-08-18 12:00 |
14:30:35.80 |
-13:10:53.2 |
HIP 71044 |
17.33 |
| 2026-08-19 00:00 |
14:30:51.91 |
-13:12:34.0 |
HIP 71044 |
13.44 |