메타데이터
| 항목 |
값 |
| Designation |
287P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-07-05T04:20:07.710720Z |
| Orbit solution date (soln_date, UTC) |
2025-10-30T09:37:11Z |
| Obs used |
270 |
| NEO |
- |
| M1 |
9.600 |
| K1 |
15.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-12-28.0000000 |
| e |
0.27096868 |
| q (au) |
3.038241 |
| a (au) |
4.167503 |
| i (deg) |
16.320345 |
| Ω (om, deg) |
139.045236 |
| ω (w, deg) |
188.874131 |
| M (ma, deg) |
253.514373 |
밝기
산란 + 전체 선형
$$
M_a = (10.191 + 5.080\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.191 |
| n |
5.080 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2022-05-13 |
2023-07-04 |
+6.3005 |
-3.721 |
| 2023-07-12 |
2024-12-26 |
+1.9974 |
-0.830 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
07:09:04.11 |
+16:23:31.5 |
HIP 34482 |
7.53 |
| 2026-06-01 12:00 |
07:09:29.71 |
+16:23:36.9 |
HIP 34540 |
9.55 |
| 2026-06-02 00:00 |
07:09:55.38 |
+16:23:41.7 |
HIP 34540 |
12.24 |
| 2026-06-02 12:00 |
07:10:21.10 |
+16:23:45.9 |
HIP 34540 |
16.88 |
| 2026-06-03 00:00 |
07:10:46.87 |
+16:23:49.5 |
HIP 34540 |
22.28 |
| 2026-06-03 12:00 |
07:11:12.69 |
+16:23:52.5 |
HIP 34540 |
28.02 |
| 2026-06-04 00:00 |
07:11:38.56 |
+16:23:54.9 |
HIP 34909 |
28.74 |
| 2026-06-04 12:00 |
07:12:04.49 |
+16:23:56.7 |
HIP 34909 |
23.57 |
| 2026-06-05 00:00 |
07:12:30.47 |
+16:23:57.9 |
HIP 34909 |
19.04 |
| 2026-06-05 12:00 |
07:12:56.49 |
+16:23:58.6 |
HIP 34909 |
15.70 |
| 2026-06-06 00:00 |
07:13:22.57 |
+16:23:58.6 |
HIP 34947 |
13.07 |
| 2026-06-06 12:00 |
07:13:48.69 |
+16:23:58.1 |
HIP 34947 |
10.90 |
| 2026-06-07 00:00 |
07:14:14.86 |
+16:23:56.9 |
HIP 34947 |
12.07 |
| 2026-06-07 12:00 |
07:14:41.08 |
+16:23:55.2 |
HIP 35006 |
12.61 |
| 2026-06-08 00:00 |
07:15:07.34 |
+16:23:52.9 |
HIP 35006 |
14.98 |
| 2026-06-08 12:00 |
07:15:33.65 |
+16:23:50.0 |
HIP 35068 |
17.79 |
| 2026-06-09 00:00 |
07:16:00.01 |
+16:23:46.5 |
HIP 35266 |
17.86 |
| 2026-06-09 12:00 |
07:16:26.41 |
+16:23:42.5 |
HIP 35266 |
12.10 |
| 2026-06-10 00:00 |
07:16:52.85 |
+16:23:37.8 |
HIP 35266 |
7.34 |
| 2026-06-10 12:00 |
07:17:19.33 |
+16:23:32.6 |
HIP 35266 |
6.46 |
| 2026-06-11 00:00 |
07:17:45.86 |
+16:23:26.7 |
HIP 35350 |
10.15 |
| 2026-06-11 12:00 |
07:18:12.43 |
+16:23:20.3 |
HIP 35350 |
9.24 |
| 2026-06-12 00:00 |
07:18:39.04 |
+16:23:13.4 |
HIP 35404 |
11.96 |
| 2026-06-12 12:00 |
07:19:05.69 |
+16:23:05.8 |
HIP 35404 |
13.86 |
| 2026-06-13 00:00 |
07:19:32.38 |
+16:22:57.7 |
HIP 35591 |
16.26 |
| 2026-06-13 12:00 |
07:19:59.10 |
+16:22:48.9 |
HIP 35591 |
9.86 |
| 2026-06-14 00:00 |
07:20:25.87 |
+16:22:39.6 |
HIP 35591 |
3.50 |
| 2026-06-14 12:00 |
07:20:52.67 |
+16:22:29.8 |
HIP 35591 |
3.12 |
| 2026-06-15 00:00 |
07:21:19.50 |
+16:22:19.3 |
HIP 35591 |
9.50 |
| 2026-06-15 12:00 |
07:21:46.37 |
+16:22:08.3 |
HIP 35591 |
15.93 |
| 2026-06-16 00:00 |
07:22:13.28 |
+16:21:56.7 |
HIP 35591 |
22.38 |
| 2026-06-16 12:00 |
07:22:40.22 |
+16:21:44.6 |
HIP 35720 |
24.04 |
| 2026-06-17 00:00 |
07:23:07.19 |
+16:21:31.8 |
HIP 35875 |
21.34 |
| 2026-06-17 12:00 |
07:23:34.19 |
+16:21:18.6 |
HIP 35875 |
19.48 |
| 2026-06-18 00:00 |
07:24:01.22 |
+16:21:04.7 |
HIP 35875 |
19.69 |
| 2026-06-18 12:00 |
07:24:28.28 |
+16:20:50.3 |
HIP 35875 |
21.92 |
| 2026-06-19 00:00 |
07:24:55.37 |
+16:20:35.3 |
HIP 35875 |
25.66 |
| 2026-06-19 12:00 |
07:25:22.49 |
+16:20:19.8 |
HIP 35875 |
30.35 |
| 2026-06-20 00:00 |
07:25:49.64 |
+16:20:03.7 |
HIP 36107 |
30.19 |
| 2026-06-20 12:00 |
07:26:16.82 |
+16:19:47.1 |
HIP 36107 |
29.71 |
| 2026-06-21 00:00 |
07:26:44.01 |
+16:19:29.9 |
HIP 36107 |
30.66 |
| 2026-06-21 12:00 |
07:27:11.24 |
+16:19:12.2 |
HIP 36107 |
32.90 |
| 2026-06-22 00:00 |
07:27:38.49 |
+16:18:53.9 |
HIP 36406 |
27.83 |