210P/Christensen
메타데이터
| 항목 | 값 |
|---|---|
| Designation | 210P/Christensen |
| Type | P |
| Perihelion (tp_cal, UTC) | 2025-11-22T17:09:21.078720Z |
| Orbit solution date (soln_date, UTC) | 2026-07-20T21:57:56Z |
| Obs used | 256 |
| NEO | Yes |
| M1 | 14.300 |
| K1 | 14.750 |
| PC | - |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2024-09-28.0000000 |
| e | 0.83405250 |
| q (au) | 0.524674 |
| a (au) | 3.161684 |
| i (deg) | 10.286584 |
| Ω (om, deg) | 93.798016 |
| ω (w, deg) | 345.932809 |
| M (ma, deg) | 286.241146 |
밝기
산란 + 전체 선형
$$ M_a = (15.262 + 2.954\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 15.262 |
| n | 2.954 |
| gf | 0.800 |
| gb | -0.500 |
| k | 1.000 |
| δ90 | 1.000 |
| 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 |
|---|---|---|---|
| 2025-07-19 | 2025-11-04 | +5.8982 | +1.198 |
| 2025-11-26 | 2026-05-09 | +1.5482 | -1.408 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
찾아보기
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-07-29 00:00 | 13:58:44.97 | -04:01:23.0 | HIP 68221 | 24.69 |
| 2026-07-29 12:00 | 13:59:02.35 | -04:04:29.8 | HIP 68221 | 24.55 |
| 2026-07-30 00:00 | 13:59:19.88 | -04:07:36.8 | HIP 68221 | 25.58 |
| 2026-07-30 12:00 | 13:59:37.56 | -04:10:43.9 | HIP 68221 | 27.67 |
| 2026-07-31 00:00 | 13:59:55.41 | -04:13:51.2 | HIP 68221 | 30.62 |
| 2026-07-31 12:00 | 14:00:13.41 | -04:16:58.5 | HIP 68221 | 34.22 |
| 2026-08-01 00:00 | 14:00:31.56 | -04:20:06.0 | HIP 68221 | 38.30 |
| 2026-08-01 12:00 | 14:00:49.86 | -04:23:13.5 | HIP 68221 | 42.74 |
| 2026-08-02 00:00 | 14:01:08.31 | -04:26:21.2 | HIP 68639 | 41.45 |
| 2026-08-02 12:00 | 14:01:26.92 | -04:29:28.9 | HIP 68639 | 36.02 |
| 2026-08-03 00:00 | 14:01:45.67 | -04:32:36.8 | HIP 68639 | 30.63 |
| 2026-08-03 12:00 | 14:02:04.56 | -04:35:44.7 | HIP 68639 | 25.32 |
| 2026-08-04 00:00 | 14:02:23.60 | -04:38:52.7 | HIP 68639 | 20.18 |
| 2026-08-04 12:00 | 14:02:42.78 | -04:42:00.8 | HIP 68639 | 15.42 |
| 2026-08-05 00:00 | 14:03:02.11 | -04:45:08.9 | HIP 68639 | 11.55 |
| 2026-08-05 12:00 | 14:03:21.58 | -04:48:17.1 | HIP 68639 | 9.77 |
| 2026-08-06 00:00 | 14:03:41.18 | -04:51:25.4 | HIP 68639 | 11.18 |
| 2026-08-06 12:00 | 14:04:00.93 | -04:54:33.7 | HIP 68639 | 14.93 |
| 2026-08-07 00:00 | 14:04:20.81 | -04:57:42.0 | HIP 68639 | 19.75 |
| 2026-08-07 12:00 | 14:04:40.83 | -05:00:50.4 | HIP 68739 | 22.99 |
| 2026-08-08 00:00 | 14:05:00.98 | -05:03:58.9 | HIP 68739 | 22.15 |
| 2026-08-08 12:00 | 14:05:21.27 | -05:07:07.3 | HIP 68739 | 22.89 |
| 2026-08-09 00:00 | 14:05:41.69 | -05:10:15.8 | HIP 68949 | 20.88 |
| 2026-08-09 12:00 | 14:06:02.24 | -05:13:24.3 | HIP 68949 | 19.11 |
| 2026-08-10 00:00 | 14:06:22.93 | -05:16:32.8 | HIP 68936 | 15.26 |
| 2026-08-10 12:00 | 14:06:43.74 | -05:19:41.4 | HIP 68936 | 11.41 |
| 2026-08-11 00:00 | 14:07:04.68 | -05:22:49.9 | HIP 68936 | 10.07 |
| 2026-08-11 12:00 | 14:07:25.75 | -05:25:58.4 | HIP 68936 | 12.14 |
| 2026-08-12 00:00 | 14:07:46.94 | -05:29:06.9 | HIP 68936 | 16.40 |
| 2026-08-12 12:00 | 14:08:08.26 | -05:32:15.4 | HIP 68936 | 21.61 |
| 2026-08-13 00:00 | 14:08:29.70 | -05:35:23.9 | HIP 68936 | 27.26 |
| 2026-08-13 12:00 | 14:08:51.26 | -05:38:32.3 | HIP 69242 | 27.27 |
| 2026-08-14 00:00 | 14:09:12.94 | -05:41:40.8 | HIP 69242 | 24.15 |
| 2026-08-14 12:00 | 14:09:34.74 | -05:44:49.1 | HIP 69242 | 22.37 |
| 2026-08-15 00:00 | 14:09:56.66 | -05:47:57.4 | HIP 69282 | 18.32 |
| 2026-08-15 12:00 | 14:10:18.70 | -05:51:05.7 | HIP 69282 | 12.04 |
| 2026-08-16 00:00 | 14:10:40.86 | -05:54:13.9 | HIP 69282 | 5.83 |
| 2026-08-16 12:00 | 14:11:03.12 | -05:57:22.0 | HIP 69282 | 1.84 |
| 2026-08-17 00:00 | 14:11:25.50 | -06:00:30.0 | HIP 69282 | 7.36 |
| 2026-08-17 12:00 | 14:11:47.99 | -06:03:38.0 | HIP 69361 | 4.11 |
| 2026-08-18 00:00 | 14:12:10.60 | -06:06:45.9 | HIP 69361 | 4.64 |
| 2026-08-18 12:00 | 14:12:33.31 | -06:09:53.7 | HIP 69361 | 10.46 |
| 2026-08-19 00:00 | 14:12:56.12 | -06:13:01.4 | HIP 69361 | 16.78 |