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) |
| 2026-05-12 00:00 |
06:52:53.84 |
+16:11:40.1 |
HIP 32958 |
29.12 |
| 2026-05-12 12:00 |
06:53:16.57 |
+16:12:09.8 |
HIP 33205 |
29.64 |
| 2026-05-13 00:00 |
06:53:39.39 |
+16:12:38.9 |
HIP 33205 |
26.66 |
| 2026-05-13 12:00 |
06:54:02.30 |
+16:13:07.5 |
HIP 33205 |
24.56 |
| 2026-05-14 00:00 |
06:54:25.30 |
+16:13:35.3 |
HIP 33205 |
23.57 |
| 2026-05-14 12:00 |
06:54:48.39 |
+16:14:02.6 |
HIP 33205 |
23.85 |
| 2026-05-15 00:00 |
06:55:11.56 |
+16:14:29.3 |
HIP 33205 |
25.38 |
| 2026-05-15 12:00 |
06:55:34.82 |
+16:14:55.3 |
HIP 33205 |
27.97 |
| 2026-05-16 00:00 |
06:55:58.17 |
+16:15:20.7 |
HIP 33469 |
25.23 |
| 2026-05-16 12:00 |
06:56:21.59 |
+16:15:45.6 |
HIP 33469 |
20.99 |
| 2026-05-17 00:00 |
06:56:45.10 |
+16:16:09.7 |
HIP 33469 |
17.53 |
| 2026-05-17 12:00 |
06:57:08.70 |
+16:16:33.3 |
HIP 33469 |
15.41 |
| 2026-05-18 00:00 |
06:57:32.37 |
+16:16:56.3 |
HIP 33469 |
15.24 |
| 2026-05-18 12:00 |
06:57:56.12 |
+16:17:18.6 |
HIP 33469 |
17.08 |
| 2026-05-19 00:00 |
06:58:19.96 |
+16:17:40.4 |
HIP 33618 |
18.73 |
| 2026-05-19 12:00 |
06:58:43.87 |
+16:18:01.5 |
HIP 33618 |
16.41 |
| 2026-05-20 00:00 |
06:59:07.85 |
+16:18:22.0 |
HIP 33618 |
15.93 |
| 2026-05-20 12:00 |
06:59:31.92 |
+16:18:41.9 |
HIP 33618 |
17.46 |
| 2026-05-21 00:00 |
06:59:56.05 |
+16:19:01.2 |
HIP 33715 |
15.05 |
| 2026-05-21 12:00 |
07:00:20.26 |
+16:19:19.8 |
HIP 33715 |
14.63 |
| 2026-05-22 00:00 |
07:00:44.55 |
+16:19:37.9 |
HIP 33715 |
16.41 |
| 2026-05-22 12:00 |
07:01:08.90 |
+16:19:55.3 |
HIP 33715 |
19.82 |
| 2026-05-23 00:00 |
07:01:33.33 |
+16:20:12.1 |
HIP 33715 |
24.19 |
| 2026-05-23 12:00 |
07:01:57.82 |
+16:20:28.3 |
HIP 33937 |
21.73 |
| 2026-05-24 00:00 |
07:02:22.39 |
+16:20:44.0 |
HIP 33937 |
19.91 |
| 2026-05-24 12:00 |
07:02:47.02 |
+16:20:59.0 |
HIP 34057 |
18.71 |
| 2026-05-25 00:00 |
07:03:11.72 |
+16:21:13.3 |
HIP 34057 |
14.25 |
| 2026-05-25 12:00 |
07:03:36.49 |
+16:21:27.1 |
HIP 34057 |
11.22 |
| 2026-05-26 00:00 |
07:04:01.32 |
+16:21:40.3 |
HIP 34057 |
10.93 |
| 2026-05-26 12:00 |
07:04:26.22 |
+16:21:52.9 |
HIP 34057 |
13.57 |
| 2026-05-27 00:00 |
07:04:51.18 |
+16:22:04.9 |
HIP 34057 |
17.90 |
| 2026-05-27 12:00 |
07:05:16.20 |
+16:22:16.2 |
HIP 34057 |
23.00 |
| 2026-05-28 00:00 |
07:05:41.28 |
+16:22:27.0 |
HIP 34057 |
28.47 |
| 2026-05-28 12:00 |
07:06:06.43 |
+16:22:37.2 |
HIP 34057 |
34.13 |
| 2026-05-29 00:00 |
07:06:31.64 |
+16:22:46.7 |
HIP 34437 |
30.25 |
| 2026-05-29 12:00 |
07:06:56.90 |
+16:22:55.7 |
HIP 34437 |
25.20 |
| 2026-05-30 00:00 |
07:07:22.23 |
+16:23:04.1 |
HIP 34437 |
20.70 |
| 2026-05-30 12:00 |
07:07:47.61 |
+16:23:11.8 |
HIP 34482 |
15.48 |
| 2026-05-31 00:00 |
07:08:13.05 |
+16:23:19.0 |
HIP 34482 |
10.19 |
| 2026-05-31 12:00 |
07:08:38.55 |
+16:23:25.6 |
HIP 34482 |
6.54 |
| 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 |